The opinion of the Court was delivered by
LONG, J.
In 1991, petitioner Helen Kasper was working as ari educational media specialist for the Newark Board of Education and was enrolled in the Teacher’s Pension and Annuity Fund. On May 31, 1991, Ms. Kasper arrived at school at 7:45 a.m. Although the school day officially began at 8:30 a.m., Ms. Kasper came early, as she had every morning for nine months, because the school principal required that certain media materials be distributed to various classrooms prior to the official start of classes.
[571]*571According to Ms. Kasper, her duties included distributing media materials requested by teachers each morning. Ms. Kasper stated that the principal was aware of her early arrivals and approved that practice. The other media specialist chose not to arrive prior to the 8:30 a.m. opening; consequently, Ms. Kasper had to do most of the early distribution.
That morning, Ms. Kasper parked her car and proceeded across the street to school property. As she climbed the school steps to the front door of the building, a man grabbed her purse and pulled her to the ground. Ms. Kasper did not remember falling but she was found face down on the ground by the school principal a few moments after the attack. Her purse had been stolen and she suffered several injuries.
Ms. Kasper continued to work until September 1, 1996, when she filed a claim for accidental disability retirement benefits pursuant N.J.S.A. 18A:66-39(c).1 The Teachers’ Pension and Annuity Fund Board (“Board”) subsequently determined that Ms. Kasper was totally and permanently disabled from the performance of her duties, that her disability was the direct result of a “traumatic event” and that she qualified for an ordinary service retirement. However, the Board denied Ms. Kasper’s application for accidental disability retirement benefits because the traumatic event did not occur “during and as a result of the performance of her regular or assigned duties” as required by statute.
Ms. Kasper challenged the Board’s determination. Following a hearing, the Administrative Law Judge (ALJ) recommended to the Board that it deny Ms. Kasper accidental disability retirement.
The ALJ found that a traumatic event occurred while Ms. Kasper was “-within the physical boundaries of her place of employment”; that she “had voluntarily come to the school to perform regular or assigned duties before hours”; and that her doing [572]*572so had not violated any work rules of her employer. The ALJ framed the dispositive question before him as whether Ms. Kasper “had actually completed her regular morning commute to work and had commenced the voluntary portion of her work day____” The ALJ reasoned that “an event which occurs before ‘performance’ and before arrival ‘at a place of employment’ cannot serve as the predicate event for an accidental disability pension award”:
Ms. Kasper had entered the school’s physical property, but not yet into the building itself. Her physical presence within the school grounds at the time of the assault is not a factor sufficient to overcome the reality that the assault actually occurred as she neared the end of her normal commute to work. It seems clear that had she been assaulted in the public roadway in front of the school, off of the property owned by the Board, she could not realistically claim to have commenced her performance of duties at the moment of the assault. The fact that she took a few steps more onto the Board’s property is not sufficient to remove this incident from an event which occurred during the ‘coming1 stage to one occurring after commencement of duties, nor does that statutory amendment expanding the scope of duties to include voluntary performance of duties before or after required hours of employment avail the claimant. There were no duties for Ms. Kasper to perform until she at least entered the building. Again, the harder question would be posed if the assault had occurred within the school building while she was proceeding down the corridor and before she reached the principal’s office and actually began her duties.
The Board agreed and denied Ms. Kasper an accidental disability pension.
In an unpublished opinion, the Appellate Division affirmed the Board’s determination. Applying the traditional principle that a reviewing court must accord an agency determination great deference, the Appellate Division held that “Kasper’s regular early arrival at work ... did not convert the assault occurring outside the school building to a traumatic event occurring during the voluntary performance of her regular or assigned duties.”
We granted Ms. Kasper’s petition for certification. 162 N.J. 661, 745 A.2d 1212 (1999). On appeal, she claims that the ALJ and the Appellate Division erred by not considering the impact of a 1986 amendment to N.J.S.A. 18A:66-39(c) that states:
A traumatic event occurring during voluntary performance of regular or assigned duties at a place of employment before or after required hours of employment which is not in violation of any valid work rule of the employer or otherwise [573]*573prohibited by the employer shall be deemed as occurring during the performance of regular or assigned duties.
She argues that that language expanded the meaning of the phrase “during and as result of the performance of his regular or assigned duties.” She also contests the conclusions of the ALJ and the Appellate Division because they were “based on workers’ compensation principles” that do not govern accidental disability claims. The New Jersey Education Association filed a brief supporting Ms. Kasper.
The Board counters that Ms. Kasper’s interpretation of N.J.S.A. 18A:66-39(e) is incorrect. In support, it argues that Ms. Kasper was not in a “pre-shift period” to her duties; that she had not entered the school building or started her workday; and that she was in transit, albeit almost to the door of her workplace, when the incident took place. Thus, the Board maintains that Ms. Kasper is not entitled to accidental disability because she was not injured during and as a result of the performance of her regular or assigned duties.
I.
Pursuant to the Teachers’ Pension and Annuity Fund Law (TPAF), N.J.S.A. 18A:66-1 to -93, there are two ways in which an education professional can receive retirement benefits upon becoming permanently incapacitated: ordinary disability and accidental disability. N.J.S.A. 18A:66-39(b) and (c). Ordinary disability is conferred when a teacher, who is a member of the retirement system, is “physically or mentally incapacitated for the performance of duty and should be retired.” N.J.S.A. 18A:66-39(b). Accidental disability is awarded
if a member is permanently and totally disabled as a direct result of a traumatic event occurring during and as a result of the performance of his regular or assigned duties____
[N.J.S.A. 18A:66-39(c).]
Those pensions are dramatically different. A person retired on an ordinary disability pension is guaranteed an allowance of at least forty percent of his or her final compensation, whereas one retired [574]*574on an accidental disability pension is guaranteed two-thirds of his or her actual annual compensation at the time of the accident. N.J.S.A. 18A:66-41 and 18A:66-42; Steinmann v. State, Dept. of Treasury, Div. of Pensions, TPAF, 116 N.J. 564, 567, 562 A.2d 791 (1989). Because higher benefits flow to the recipient of an accidental disability award than to one who receives an ordinary disability award, Maynard v. Board of Trustees, TPAF, 113 N.J. 169, 172, 549 A.2d 1213 (1988), the standards applicable to the former are more stringent than those applicable to the latter. To receive an ordinary disability pension, incapacitation is all that is required. To qualify for an accidental disability retirement benefit, the applicant must (1) be permanently and totally disabled (2) as a direct result (3) of a traumatic event (4) that occurred during and as a result of the performance of regular job duties.
The other major public employee pension funds (Public Employees’ Retirement System (PERS), N.J.S.A. 43:15A-1 to -141, and the Police and Firemen’s Retirement System (PFRS), N.J.S.A. 43:16A-1 to -68) are governed by accidental disability provisions identical to the TPAF. N.J.S.A 43:15A-43 and N.J.S.A 43:16A-7.
The present version of N.J.S.A. 18A:66-39(e) is different from its predecessor. The accidental disability section in the original TPAF, L. 1955 c. 37, § 39, read as follows:
A [TPAF] member who has not attained age 70 shall ... be retired by the [PERS] board of trustees, if said employee is disabled as a result of personal injuries sustained in or from an accident arising out of and in the course of his employment, on an accidental disability allowance.
Under that statute, an applicant had to prove that (1) he or she was disabled (2) as a result of personal injuries (3) sustained in an accident (4) arising out of or in the course of his or her employment.
One key to evaluating accidental disability retirement claims under the old statute was whether the alleged disability was the result of an accident “arising out of and in the course of the employee’s employment.” Maynard, supra, 113 N.J. at 171, 549 A.2d 1213. That statutory language was virtually identical to the language found in the Workers’ Compensation Act. N.J.S.A. [575]*57534:15-1. Thus, in early accidental disability cases, courts were influenced strongly by developments in the workers’ compensation field. Getty v. Prison Officers’ Pension Fund, 85 N.J.Super. 383, 390, 204 A.2d 883 (App.Div.1964) (using rationale from workers’ compensation cases to determine that disability claimant need only show “reasonable probability” that ordinary work effort or strain contributed to injury); Fattore v. Police and Firemen’s Retirement System, 80 N.J.Super. 541, 549, 194 A.2d 363 (App.Div.) (holding that “principles of the Workmen’s Compensation Act as construed should be applied in passing upon the issue of causal connection between the work effort and the alleged accidental injury” in public employee disability pension actions), certif. denied, 41 N.J. 245, 196 A.2d 6 (1963); Roth v. Board of Trustees, PERS, 49 N.J.Super. 309, 317, 139 A.2d 761 (App.Div.1958) (following standards for employment-relation in workers’ compensation field to award PERS death benefits).
In 1966 and 1967, there was a “concerted legislative effort to effect a basic change in the standards for awarding accidental disability retirement pensions”; identical amendments were enacted with respect to the accidental disability pensions provided in the several major state pension systems that “changed [them] fundamentally.” Gerba v. Board of Trustees, PERS, 83 N.J. 174, 183, 416 A.2d 314 (1980). Those amended statutes included the TPAF Law.2 The amendments provided that, in order to receive accidental disability benefits, an employee must establish that he or she was “permanently and totally disabled as a direct result of a traumatic event occurring during and as a result of the performance of his regular or assigned duties.” See N.J.S.A. 18A:66-39(e). Thus, the statute was clearly altered in four ways: “disability” became “permanent and total disability”; “accident” became “traumatic event”; “result” became “direct result”; and “arising out of and in the course of employment” became “during and as a [576]*576result of the performance of his regular or assigned duties.” Those amendments expressed the Legislature’s disapproval of decisions that had applied workers’ compensation principles in determining what constituted an “accident” in the pension context.3 Russo v. Teachers’ Pension and Annuity Fund, 62 N.J. 142, 149, 299 A.2d 697 (1973).
We have already declared that the purpose of those amendments was to make the granting of an accidental disability pension more difficult. Cattani v. Board of Trustees, PFRS, 69 N.J. 578, 586, 355 A.2d 625 (1976); Gerbo, supra, 83 N.J. at 183, 416 A.2d 314. We have also specifically addressed two of the four changes brought about by the amendment. First, the traumatic event language obviously raised the bar for determining what kind of an injury qualified a petitioner for an accidental disability pension. Gable v. Board of Trustees, PERS, 115 N.J. 212, 219-20, 557 A.2d 1012 (1989) (citing Cattani, supra, 69 N.J. at 586, 355 A.2d 625). See Russo, supra, 62 N.J. at 153-54, 299 A.2d 697 (recognizing that substitution of phrase “traumatic event” for “accident” was intended to create narrower class of situations in which accidental disability pensions were granted).
[T]o be eligible for accidental disability retirement allowance, a worker must demonstrate (1) that his injuries were not induced by the stress or strain of the normal work effort; (2) that he met involuntarily with the object or matter that was the source of the harm; and (3) that the source of the injury itself was a great rush of force or uncontrollable power.
[Kane v. Board of Trustees, PFRS, 100 N.J. 651, 663, 498 A.2d 1252 (1985).]
In short, “the legislature intended that an accidental disability pension ought to be awarded in cases of serious and permanent harm to the worker, in which the worker himself is exposed to a violent level of force or impact.” Id. at 662, 498 A.2d 1252.
[577]*577We have likewise recognized that the purpose behind the Legislature’s change of the term “result” to “direct result” was “intended to impose a stringent test of medical causation and ... that the trauma ... must at the very least be the essential significant or the substantial contributing cause of the disability.” Korelnia v. Board of Trustees, PERS, 83 N.J. 163, 170, 416 A.2d 308 (1980) (citing Gerbo, supra, 83 N.J. at 186, 416 A.2d 314). In both instances, we concluded that the legislative focus was to narrow the cases that would qualify for an accidental disability pension.
II.
We have not specifically addressed the Legislature’s intent in substituting “occurring during and as a result of the performance of [] regular or assigned duties” for the original statutory language of “arising out of and in the course of [ ] employment.” The legislative history of the statute is silent on that issue. It is for us to determine its purpose. V.C. v. M.J.B., 163 N.J. 200, 217, 748 A.2d 539 (2000); Higgins v. Pascack Valley Hosp., 158 N.J. 404, 418-19, 730 A.2d 327 (1999); Lesniak v. Budzash, 133 N.J. 1, 8, 626 A.2d 1073 (1993).
Any such analysis begins with the language of the statute which, if clear, governs. State v. Mortimer, 135 N.J. 517, 532, 641 A.2d 257, cert. denied, 513 U.S. 970, 115 S.Ct. 440, 130 L.Ed.2d 351 (1994); Kimmelman v. Henkels & McCoy Inc., 108 N.J. 123, 128, 527 A.2d 1368 (1987). When an amendment is concerned, the Legislature cannot be presumed to have regarded the change as meaningless. Nagy v. Ford Motor Co., 6 N.J. 341, 347-48, 78 A.2d 709 (1951). On the contrary, the general rule is that a change is presumed to evidence a departure from the old law. Gatto Design & Dev. Carp. v. Township of Colts Neck, 316 N.J.Super. 110, 115, 719 A.2d 707 (App.Div.1998); In re Sussex County Mun. Util. Auth., 198 N.J.Super. 214, 217, 486 A.2d 932 (App.Div.), certif. denied, 101 N.J. 267, 501 A.2d 934 (1985). The presumption is strongest when, as here, the entire statute was not overhauled but an isolated independent amendment was enacted. [578]*578Ridge Erection Co. v. Mountain States Tel. & Tel. Co., 37 Colo. App. 477, 549 P.2d 408, 411 (1976); North River Ins. Co. v. Gibson, 244 S.C. 393, 137 S.E.2d 264, 266 (1964).
III.
The original version of the accidental disability statute read “arising out of and in the course of employment.” The amendment reads “during and as a result of the performance of his regular or assigned duties.” Prior to the 1966 amendment, the phrase “arising out of and in the course of employment” had a well-established meaning in the workers’ compensation law; understanding that meaning is crucial to understanding the 1966 amendment to the accidental disability statute.
Volumes have been written about what injuries “arise out of and in the course of employment” in the workers’ compensation context. Traditionally, for workers’ compensation purposes, the notion of “arising out of and in the course of employment” encompassed only accidents occurring on the employer’s premises. That so-called “premises rule” has been characterized as serving the twin goals of certainty and fairness. 1 Arthur Larson, The Law of Workmen’s Compensation, § 15.10 (1990). See Livingstone v. Abraham & Straus, Inc., 111 N.J. 89, 96, 543 A.2d 45 (1988) (noting that premises rule was developed to “facilitate the task of distinguishing compensable from non-compensable incidents”); Morris v. Hermann Forwarding Co., 18 N.J. 195, 197-98, 113 A.2d 513 (1955) (commenting that because industry must carry burden of worker’s compensation benefits, employee must prove casual connection between employment and injury).
Out of that basic test for compensability came a necessary concomitant, “the going and coming rule, which ordinarily precluded an award of compensation benefits for injuries sustained during routine travel to and from an employee’s regular place of work.” Livingstone, supra, 111 N.J. at 96, 543 A.2d 45. The going and coming rule refers to the prohibition against compensability for injuries occurring while an employee is going to or coming from [579]*579work. 1 Larson, supra, § 15.11. Like the premises rule from which it arose, the going and coming rule allows employers and insurers to predict their expected costs and, at the same time, insures fairness because an employee’s routine trip to and from work yields neither special benefit to the employer nor results in a special risk to the employee. Ibid.; Morris, supra, 18 N.J. at 197-98, 113 A.2d 513.
As time passed however, our courts chipped away at the going and coming rule with regularity and expanded compensability far beyond the confines of the employer’s premises. In Hammond v. Great Atlantic & Pacific Tea Co., 56 N.J. 7, 14, 264 A.2d 204 (1970), we detailed that erosion:
These exceptions include situations where the employee is on a special mission for his employer, where the employer furnishes transportation to and from the place of employment, where the use of an automobile or other form of vehicle is required in the performance of the contract of service, and where the employer pays for the employee’s transportation. Even these exceptions have been broadly construed to comport with the liberal philosophy behind the enactment of the Workmen’s Compensation Act. Thus in Ricciardi.[v. Damar Products Co., 45 N.J. 54, 211 A.2d 347 (1965) ], an accident occurring on the way home from a company picnic was held to be compensable within the special mission exception. And in Lehigh [Navigation Coal Co. v. McGonnell, 120 N.J.L. 428, 199 A. 906 (Sup.Ct.1938), aff'd o.b. 121 N.J.L. 583, 3 A.2d 581 (E. & A.1939) ], compensation was allowed when an employee was killed after his employer had provided a commutation ticket for railroad commutation although the accident occurred 75 to 100 feet from the place where he would board the train.
The large number of exceptions and their application by the courts have led one commentator to remark that “the exceptions are so numerous that they have swallowed the rule.” (Citations omitted).
Ultimately, in 1979, the definition of employment in the Workers’ Compensation Act was amended to abrogate the judicially created exceptions to the going and coming rule. Senate Labor, Industry and Professions Committee, Joint Statement to Senate Committee Substitute for Sen. No. 802 and Assembly Committee Substitute for Assem. No. 810, at 2 (Nov. 13, 1979). Employment is now defined as commencing “when an employee arrives at the employer’s place of employment to report for work and shall terminate when the employee leaves the employer’s place of [580]*580employment, excluding areas not under the control of the employer.” N.J.S.A. 34:15-36.
As we noted, legislative history surrounding the 1966 and 1967 amendments to the accidental disability statute is sparse. Nevertheless, it seems clear that substitution of the language “during and as a result of the performance of his regularly assigned duties” for the phrase “arising out of and in the course of’ was premonitory of the 1979 amendment to the workers’ compensation statute and was intended to reestablish the integrity of the premises rule and eliminate the judicially created exceptions to the going and coming rule. Thus, under N.J.S.A. 18A:66-39(c), in order to qualify for an accidental disability pension, the accident must occur on premises owned or controlled by the employer, and not during activities encompassed within the myriad of coming and going exceptions that had sprung up. To assure that result, the Legislature added the caveat that the accident had to take place “during and as a result of the performance of [the employee’s] regular and assigned duties,” — a standard that could not be satisfied by a commuting accident. That standard must be understood as restorative and not transformative.
IV.
Several administrative decisions have addressed the issue before us. They are important because, in interpreting amendments to statutes, courts often give substantial weight to prior interpretations by the agency charged with implementing the statute.
[T]he courts will generally show great deference to an agency’s interpretation of a statute. A reviewing court should accord considerable weight to an executive department’s construction of the statutory scheme it is entrusted to administer. The court will give a heightened degree of deference to the agency’s interpretation when the statute is within the agency’s field of expertise, and less deference to agency construction and interpretation of a statute which has not previously been subjected to judicial scrutiny or time-tested agency interpretations.
[2 Am.Jur.2d Admin. Law § 524 (1994) (footnotes omitted).]
See New Jersey Turnpike Auth. v. American Fed. of State, County and Mun. Employees, Council 73, 150 N.J. 331, 351, 696 [581]*581A.2d 585 (1997); Merin v. Maglaki 126 N.J. 430, 437, 599 A.2d 1256 (1992).
Furthermore, when the Legislature has not addressed the precise question of statutory meaning, the reviewing court
may not simply impose its own construction on the statute, as would be necessary in the absence of an administrative interpretation. Rather, if the statute is silent or ambiguous with respect to the specific issue, the question for the court is whether the agency’s answer is based on a permissible construction of the statute.
To uphold an agency’s construction of a statute that is silent or ambiguous with respect to the question at issue, a reviewing court need not conclude that the agency construction was the only one it permissibly could have adopted, or even the reading the court would have reached if the question initially had arisen in a judicial proceeding.
[2 Am.Jur. 2d Admin. Law § 525 (1994) (footnotes omitted).]
See Metromedia, Inc. v. Director, Div. of Taxation, 97 N.J. 313, 327, 478 A.2d 742 (1984).
Although we might quibble with the application in one or two agency decisions, they uniformly incorporate the standard to which we have adverted: that an employee cannot be “coming or going” to work, but must be engaged in his or her employment duties on property owned or controlled by the employer in order to qualify for an accidental disability pension. See, e.g., Lewis-Miles v. Board of Trustees, PERS, TYP 8932-96, Initial Decision, 1998 WL 656533 (July 16, 1998), adopted, (Aug. 20, 1998)4 (holding that employee was not injured during and as result of performance of duties but was still commuting when, shortly after driving through front gate of employer’s facility, her car slid on ice and struck oncoming car head-on; employee had not yet reached her normal work location, had not signed in, and had not begun her usual work duties); Estate of Matza v. Board of Trustees, TPAF, 96 N.J.A.R.2d (TYP) 224, 1996 WL 777047 (1996) (holding that teacher who slipped and fell on ice while walking across school parking lot towards school was “on his way to work and was not yet in the performance of his duties at the time of the [582]*582incident”); Loftus v. Board of Trustees, TPAF, 95 N.J.A.R.2d (TYP) 14, 1994 WL 738150 (1994) (concluding that teacher, who was home sick but was required to visit school in afternoon to drop off students’ grades, was not injured during and as result of duties when she crashed her ear in front of school building); Osborne v. Board of Trustees, PFRS, 93 N.J.A.R.2d (TYP) 1, 1992 WL 438361 (1992) (denying compensation to police officer who was on his way to work for 10:30 start time and was injured in ear accident at 10:27, even though officer subsequently used police car radio, that was routinely used to respond to calls while off-duty, to report accident and then directed traffic until other officers arrived); Osinga v. Board of Trustees, PERS, 92 N.J.A.R.2d (TYP) 16, 1992 WL 259375 (1992) (finding that school crossing guard was not injured during and as result of regular and assigned duties because, although near crossing corner, was still en route from home when she fell); Woods v. Board of Trustees, PERS, 92 N.J.A.R.2d (TYP) 160, 1992 WL 409327 (1992) (concluding that public works inspector hurt in car accident while driving from project site to office was injured during and as result of his regular duties); Fulco v. Board of Trustees, 3 N.J.A.R. 298 (TYP) (1981) (teacher who was injured opening windows in her classroom on very hot day twenty minutes to half hour prior to start of official school day was not injured during and as result of her duties).
V.
Three Appellate Division opinions have also addressed the “during and as a result of the performance of his regular or assigned duties” language. Each has either implicitly or explicitly recognized the import of the amendatory language. In Maynard, supra, 113 N.J. at 171, 177, 549 A.2d 1213, the Appellate Division ruled that a teacher, who had signed in and was proceeding to her mailbox to obtain her students’ attendance cards, was injured in a slip and fall during and as a result of the performance of her duties. We reversed on the traumatic event issue, presumably [583]*583accepting that Ms. Maynard was engaged in the performance of her duties. Id. at 177, 549 A.2d 1213.
In re Carlson, 174 N.J.Super. 603, 605, 417 A.2d 103 (App.Div. 1980), involved a teacher whose employment required that she arrive at the school premises not later than 8:35 a.m. The time period between arrival and the bell marking the commencement of school time was unstructured; teachers could use the time for any activities they choose. Ibid. However, at 8:55 a.m., teachers were required to retrieve their students from the playground. Id. at 606, 417 A.2d 103. On the day of the accident, Ms. Carlson arrived at school by 8:35 a.m., and went into the teacher’s lounge to wait until 8:55 a.m. Ibid. When the 8:55 bell rang, Ms. Carlson fell on her back while trying to retrieve her poeketbook before leaving the teacher’s lounge to meet her students. Ibid.
The Appellate Division ruled that Ms. Carlson sustained her injury during and as a result of the performance of her regular or assigned duties. In re Carlson, supra, 174 N.J.Super. at 608, 417 A.2d 103. It observed that Ms. Carlson “obviously was not expected to stand in the schoolyard door from 8:35 to 8:55.” Ibid. Therefore, “no one can doubt that she was expected to perform this required union with her pupils by going from here to there and that necessary maneuver was as much a requirement of the job as was the actual liaison.” Ibid. The Appellate Division, however, eschewed consideration of “the infinitely more difficult proposition respecting the obligation of teachers from the time of their mandated presence on the premises — -in this case 8:35 a.m.— until the ringing of the bell signaling the commencement of the school day, such as that of supervision of early arrivals or room preparation.” Id. at 607, 417 A.2d 103.
The third case, Pollara v. Board of Trustees, PFRS, 183 N.J.Super. 505, 444 A.2d 616 (App.Div.1982), involved a determination that Pollara, a police officer, was entitled to an accidental disability retirement allowance because of injuries sustained when he reported to work fifteen minutes prior to the roll call that began his actual shift. All officers were required by regulation to [584]*584report fifteen minutes before the shift’s roll call; they received compensation for that fifteen minute pre-roll call period. Id. at 507-08, 444 A.2d 616. Failure to report could result in discipline at the discretion of the sergeant. Ibid. During that time period, the officers prepared themselves for duty. Id. at 508, 444 A.2d 616.
On the day of the accident, as was expected of him, Officer Pollara used the pre-shift period to don his uniform, read the bulletin board, check the teletype for recent criminal activity and scan the stolen car list. Ibid When the roll-call bell rang, he proceeded up the stairwell between the locker room and the first floor roll call area. Ibid. As he grabbed the handrail on the stairs, it broke away from the stairs, and he fell. Pollara, supra, 183 N.J.Super. at 508, 444 A.2d 616. The Appellate Division found that Officer Pollara was engaged in the “actual performance” of his duties when he was injured. Id at 620, 417 A.2d 103. According to the panel, Carlson, supra, had extended the scope of the “as a result of’ language to encompass conduct preliminary but necessary to the actual performance of the required duty. Id. at 619, 417 A.2d 103. Likewise, the court held that
a reasonable interpretation of the statute mandates a finding that [Officer Pollara] was hurt ‘as a result of performing a regular duty; he was required by his employment to be in the locker room before his shift began and he was required to attend roll call when the 7:45 bell rang; climbing the stairs from the locker room to the roll call area was a ‘necessary maneuver’ which was as much a job requirement as was actual attendance at roll call. He was paid for the 15 minutes before roll call during which he engaged in activity useful to his job efficiency. His walk to roll call was at least as necessary as Carlson’s retrieval of her purse before embarking on her mandated route; indeed petitioner here was headed directly to his required destination while petitioner in Carlson was on a preliminary personal detour when she was hurt.
[/bid.]
Finally, Pollara ruled that its pre-shift period was significantly different from that in Carlson, where teachers were free to do as they pleased after their obligatory early arrival. Id. at 620, 417 A.2d 103. Because officers were often sent on emergencies during that pre-shift period and the police report on the accident indicat[585]*585ed that Officer Pollara was injured “on duty,” the court reasoned that the shift began at 7:30, despite the official 7:45 a.m. starting time. Ibid.
VI.
Those administrative and appellate decisions share the recurring theme that, assuming all other statutory prerequisites are met, a worker will qualify for an accidental disability pension if he or she is injured on premises owned or controlled by the employer, during or as a result of the actual performance of his or her duties, or in an activity preparatory but essential to the actual duty. That is true whether the injury occurs during the workday or before or after hours.5 In all cases, the principle that commuting injuries do not qualify is either explicitly stated or impliedly reaffirmed.
VII.
At this point, it is necessary to define more precisely the kinds of functions that will entitle an employee to an accidental disability pension. We begin with the regular workday that we define as the period during which the employee is required to be on the employer’s premises to perform regularly assigned duties.6 Regularly assigned duties include activities such as a teacher teaching, a police officer policing, and a firefighter fighting fires. However, the concept is broader. Common sense dictates that the performance of an employee’s actual duties incorporates all activities engaged in by the employee in connection with his or her [586]*586work, on the employer’s premises, from the formal beginning to the formal end of the workday.7
To the extent that Carlson suggests that an accidental disability pension might be unavailable for an injury sustained at the work location, during the actual workday, in the period between a teacher’s mandated presence on the premises and the opening bell, we disagree. The mandatory presence of the teacher on the school premises is part and parcel of his or her official duties.
That reasoning is equally applicable to Pollara, in which the Appellate Division painstakingly detailed claimant’s every action in order to justify the awarding of an accidental disability pension. In our view, his mandated presence at the work location fifteen minutes before roll call was part of the actual performance of his duties.
VIII.
That discussion leads us to consider activities prior to the mandatory start of the work day or after hours. Under N.J.S.A. 18A:66-39(c), pre- and post-workday performance of an employee’s regular or assigned duties essentially constitutes a parallel universe to the performance of those duties during the regular workday. Thus, a teacher who is required to come early or stay late for parent conferences or sports practices clearly qualifies for an accidental disability pension if she receives a disabling traumatic injury while performing those duties.
Likewise, an employee who arrives early or stays late to perform activities preliminary but integral to her duties qualifies for an accidental disability pension if the other statutory standards [587]*587are met. Indeed, we view as too crabbed the conclusion reached in at least one of the cited administrative eases. To us, it is obvious that in Fulco, the teacher’s activity of raising the windows in her oppressively hot classroom prior to the opening of school was both temporally and substantively relevant to her duties, even though the morning bell had yet not rung and she was performing that function before her presence at school was mandated.
In other words, an employee may qualify for an accidental disability pension as a result of a traumatic injury occurring prior to the start of or after the end of the formal workday, so long as the employee is at premises owned or controlled by the employer for the purpose of performing his or her regular duties and not for some other purpose. Obviously excluded are employees who arrive at work long before the required hour for a card game in the teachers’ lounge, to avoid the traffic, read the paper, pay bills, or socialize, as well as employees who return to work after hours to retrieve a left-behind wallet or date book. To the contrary, the soccer coach who arrives early to bring the equipment out to the field, or who is left on the steps of the school at night after she has shepherded her last player to a waiting car, and is disabled by a traumatic injury is performing her duties, or acts essential to her duties, at the work location and thus qualifies for an accidental disability pension.
The organizing principle is that one who is at the employer’s premises solely to do his or her duty, and who, while doing what he or she is expected to do, is disabled by a traumatic accident, will qualify for inclusion in the class of those injured “during and as a result of the performance of his regular or assigned duties.” That interpretation is faithful to the Legislature’s restorative vision in amending N.J.S.A. 18A:66-39(c). As we previously noted, the amendment was not transformative. It was not intended to limit the accidental disability pension solely to an injury sustained while a teacher is writing on the blackboard in her classroom or a policeman is actually engaged in an arrest. On the contrary, it was meant to restore the integrity of the premises [588]*588rule; to reinvigorate the going and coming rule; and to qualify for an accidental disability pension an employee who is on premises controlled by the employer and whose injury is causally connected, as a matter of common sense, to the work the employer has commissioned.
IX.
That said, it is clear that both the Board and the Appellate Division diced things too finely in concluding that there were no duties for Ms. Kasper to perform until she actually entered the school building, and that she was still on her commute to work. Ms. Kasper had completed her commute when she was injured. She was at the school, at the expected time, to distribute media materials as she was required to do. She had parked her car, crossed the street to the school, and was negotiating the stairs, in an attempt to enter the building, when she was assaulted. At that moment, she was engaged in conduct that was, in every sense, preliminary but necessary to her early workday media distribution. Ms. Kasper’s situation is indistinguishable from Officer Pollara’s ascent of the staircase to report for duty. All other statutory requirements having been met, she qualified for an accidental disability pension for the injury resulting from the traumatic event that befell her. Contrary to our dissenting colleague’s view, that outcome gives full effect to the restorative language of the accidental disability statute.
X.
The judgment of the Appellate Division is reversed. The case is remanded to the Board for proceedings consistent with this opinion.