OPINION
CAPPY1, Justice.
We granted allocatur to consider whether an arbitration award, that failed to grant teachers credit for past years of service following a break in employment with respect to their [328]*328placement on a salary schedule, can be upheld in light of certain provisions of the Pennsylvania School Code (School Code)2. For the reasons that follow, we find that the arbitrator’s award is violative of the School Code. Therefore, we reverse the order of the Commonwealth Court and reinstate the order of the Court of Common Pleas of Union County.
The Mifflinburg Area Education Association (Association) is the bargaining representative for the professional employees of the Mifflinburg Area School District (District). In 1988, the Association and the District entered into a collective bargaining agreement for the school years 1988-89 through 1992-93. The agreement contained the following salary step provision for the professional employees of the District:
ARTICLE XIII—COMPENSATION
An employee shall be placed on their [sic] salary step on the first day of each school term and no change in salary step shall be made during the school term. The salary step on the.first day of a school term shall be one higher than the step on which the district placed the employee for the immediately preceding school term. The district shall determine the salary step for an employee who did not actually work as a professional or temporary professional employee for the district during the whole immediately preceding school term.
Because the previous collective bargaining agreement between the Association and the District did not contain salary step increments, the 1988 agreement also included a fifteen step salary schedule, with placement on the schedule dependent upon the employee’s years of service in the District.
Faced with the task of assigning approximately 140 professional employees with a range of one to twenty-nine years of service on the District’s salary step schedule, the District and the Association executed a memorandum of understanding, which provided:
The following compaction salary schedule will become effective the second half of the 1988-89 school year.
[329]*329Years Bachelor Masters Step
1 1-2 $20,575 $21,175
2 3—4 $21,175 $21,775
3 5-6 $21,875 $22,475
4 7-8 $22,675 $23,275
5 9-10 $23,275 $23,875
6 11-12 $24,275 $24,875
7 13-14 $25,125 $25,725
8 15-16 $25,925 $26,525
9 17-18 $26,875 $27,475
10 19-20 $27,675 $28,275
11 21-22 $28,475 $29,075
12 23-24 $29,275 $29,875
13 25-26 $30,075 $30,675
14 27-28 $31,175 $31,775
15 29 + $32,075 $32,675
A master list of teachers will be approved. This list will contain the following: name, 1988-89 original salary, 1988-89 new salary, years of service including the 1988-89 school year, degree held; and, the 1988-89 step for the second half of the 1988-89 school year.
Following the approval of the 1988-1993 collective bargaining agreement, the District and the Association jointly prepared and approved the required “master list of teachers,” placing each professional employee of the District on a step in the compacted salary schedule corresponding to the professional employee’s years of service in the District.
In 1994, the Association filed a grievance on behalf of eight individual teachers of the District (Grievants). The Grievants had been previously employed by the District for varying periods of time, had resigned from service, most frequently for child-rearing purposes, and were subsequently re-hired. The Association claimed that when the Grievants were placed on the compacted salary schedule following approval of the 1988-1993 collective bargaining agreement, the District had improperly failed to give the Grievants credit for each year they were employed prior to their breaks in service.3
[330]*330The Board of School Directors denied the grievance and the matter was placed before an arbitrator in accordance with Section 903 of the Public Employe Relations Act.4 The arbitrator entered an award in favor of the District.
The Association thereafter filed an “Application to Vacate, Correct and Modify Arbitration Award” in the Union County Court of Common Pleas. The court found that the arbitrator’s award failed to consider the mandate of the School Code with respect to salary schedule placement. The court vacated the arbitrator’s award and- ordered that the Grievants be placed on the appropriate step of the District’s salary schedule taking into account the Grievants’ prior years of service in the District.
Commonwealth Court reversed the order of the Court of Common Pleas and reinstated the arbitrator’s award. This appeal followed.
This court announced the “essence” test as the standard- of review for appeals of arbitrators’ decisions in Community College of Beaver County v. Society of the Faculty, 473 Pa. 576, 375 A.2d 1267 (1977). Under this standard, an arbitrator’s award must derive its essence from the collective bargaining agreement to pass judicial review.
Section 1121 of the School Code requires that all contracts between school districts and professional employees contain a clause stating that none of the provisions of the School Code may be waived by school district employees. In addition, Section 703 of the Public Employe Relations Act prohibits the parties from effecting or implementing a provision in a collective bargaining agreement if implementation of [331]*331that provision would violate or be inconsistent with a statutory enactment. 43 P.S. § 1101.703. Thus, by statute, actions taken pursuant to a collective bargaining agreement cannot violate the School Code.
The Association asserts that the failure of the District to give the Grievants credit on the salary step schedule for each year they were employed prior to their breaks in service violated Sections 1142(a) and 1149 of the School Code.
Section 1142 provides in part:
§ 11-1142. Minimum Salaries and Increments
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OPINION
CAPPY1, Justice.
We granted allocatur to consider whether an arbitration award, that failed to grant teachers credit for past years of service following a break in employment with respect to their [328]*328placement on a salary schedule, can be upheld in light of certain provisions of the Pennsylvania School Code (School Code)2. For the reasons that follow, we find that the arbitrator’s award is violative of the School Code. Therefore, we reverse the order of the Commonwealth Court and reinstate the order of the Court of Common Pleas of Union County.
The Mifflinburg Area Education Association (Association) is the bargaining representative for the professional employees of the Mifflinburg Area School District (District). In 1988, the Association and the District entered into a collective bargaining agreement for the school years 1988-89 through 1992-93. The agreement contained the following salary step provision for the professional employees of the District:
ARTICLE XIII—COMPENSATION
An employee shall be placed on their [sic] salary step on the first day of each school term and no change in salary step shall be made during the school term. The salary step on the.first day of a school term shall be one higher than the step on which the district placed the employee for the immediately preceding school term. The district shall determine the salary step for an employee who did not actually work as a professional or temporary professional employee for the district during the whole immediately preceding school term.
Because the previous collective bargaining agreement between the Association and the District did not contain salary step increments, the 1988 agreement also included a fifteen step salary schedule, with placement on the schedule dependent upon the employee’s years of service in the District.
Faced with the task of assigning approximately 140 professional employees with a range of one to twenty-nine years of service on the District’s salary step schedule, the District and the Association executed a memorandum of understanding, which provided:
The following compaction salary schedule will become effective the second half of the 1988-89 school year.
[329]*329Years Bachelor Masters Step
1 1-2 $20,575 $21,175
2 3—4 $21,175 $21,775
3 5-6 $21,875 $22,475
4 7-8 $22,675 $23,275
5 9-10 $23,275 $23,875
6 11-12 $24,275 $24,875
7 13-14 $25,125 $25,725
8 15-16 $25,925 $26,525
9 17-18 $26,875 $27,475
10 19-20 $27,675 $28,275
11 21-22 $28,475 $29,075
12 23-24 $29,275 $29,875
13 25-26 $30,075 $30,675
14 27-28 $31,175 $31,775
15 29 + $32,075 $32,675
A master list of teachers will be approved. This list will contain the following: name, 1988-89 original salary, 1988-89 new salary, years of service including the 1988-89 school year, degree held; and, the 1988-89 step for the second half of the 1988-89 school year.
Following the approval of the 1988-1993 collective bargaining agreement, the District and the Association jointly prepared and approved the required “master list of teachers,” placing each professional employee of the District on a step in the compacted salary schedule corresponding to the professional employee’s years of service in the District.
In 1994, the Association filed a grievance on behalf of eight individual teachers of the District (Grievants). The Grievants had been previously employed by the District for varying periods of time, had resigned from service, most frequently for child-rearing purposes, and were subsequently re-hired. The Association claimed that when the Grievants were placed on the compacted salary schedule following approval of the 1988-1993 collective bargaining agreement, the District had improperly failed to give the Grievants credit for each year they were employed prior to their breaks in service.3
[330]*330The Board of School Directors denied the grievance and the matter was placed before an arbitrator in accordance with Section 903 of the Public Employe Relations Act.4 The arbitrator entered an award in favor of the District.
The Association thereafter filed an “Application to Vacate, Correct and Modify Arbitration Award” in the Union County Court of Common Pleas. The court found that the arbitrator’s award failed to consider the mandate of the School Code with respect to salary schedule placement. The court vacated the arbitrator’s award and- ordered that the Grievants be placed on the appropriate step of the District’s salary schedule taking into account the Grievants’ prior years of service in the District.
Commonwealth Court reversed the order of the Court of Common Pleas and reinstated the arbitrator’s award. This appeal followed.
This court announced the “essence” test as the standard- of review for appeals of arbitrators’ decisions in Community College of Beaver County v. Society of the Faculty, 473 Pa. 576, 375 A.2d 1267 (1977). Under this standard, an arbitrator’s award must derive its essence from the collective bargaining agreement to pass judicial review.
Section 1121 of the School Code requires that all contracts between school districts and professional employees contain a clause stating that none of the provisions of the School Code may be waived by school district employees. In addition, Section 703 of the Public Employe Relations Act prohibits the parties from effecting or implementing a provision in a collective bargaining agreement if implementation of [331]*331that provision would violate or be inconsistent with a statutory enactment. 43 P.S. § 1101.703. Thus, by statute, actions taken pursuant to a collective bargaining agreement cannot violate the School Code.
The Association asserts that the failure of the District to give the Grievants credit on the salary step schedule for each year they were employed prior to their breaks in service violated Sections 1142(a) and 1149 of the School Code.
Section 1142 provides in part:
§ 11-1142. Minimum Salaries and Increments
(a) Except as hereinafter otherwise provided, all school districts and vocational school districts shall pay all regular and temporary teachers, supervisors, directors and coordinators of vocational education, psychologists, teachers of classes for exceptional children, supervising principals, vocational teachers, and principals in the public schools of the district the minimum salaries and increments for the school years 1968-1969 and each school year thereafter, as provided in the following tabulation in accordance with the column in which the professional employe is grouped and the step which the professional employee has attained by years of experience within the school district each step after step 1 constituting one year of service. When a school district, by agreement, places a professional employe on a step in the salary scale, each step thereafter shall constitute one year of service. When a district adopts a salary scale in excess of the mandated scale, it shall not be deemed to have altered or increased the step which the employe has gained through years of service.
24 P.S. § ll-1142(a)(Emphasis supplied).
Section 1149 of the School Code provides:
The increments herein provided for are applicable only where the beneficiaries thereof remain in the service of the same school district. Where such teachers enter a new district they shall enter at a point in the schedule to be agreed upon between said teachers and the employing dis[332]*332tricts, which agreements shall be made part of the contract between them.
24 P.S. § 11-1149.
The District maintains that Section 1142(a) merely provides that teachers are entitled to a minimum salary with minimum yearly increments dependent upon years of experience within the school district. However, while Section 1142(a) was intended to assure that teachers receive a certain minimum salary, this section also speaks to placement on a salary schedule that is above the minimum scale. “When a district adopts a salary scale in excess of the mandated scale, it shall not be deemed to have altered or increased the step which the employe has gained through years of service.” 24 P.S. § 11-1142. We interpret this provision to require that a teacher’s past years of service are to be credited upon rehire for purposes of placement on a local salary scale. The language contained in Section 1142(a) protects professional school district employees from the patent unfairness of disregarding past years of service with the same school district when the district places a rehired teacher on a salary scale and the teacher is receiving a salary in excess of the state mandated minimum. The mandates of Section 1142 and 1149 express the legislature’s intent to protect valuable years of service performed by employees who sustained breaks in service for a variety of reasons.
The Commonwealth Court in Centennial School District v. Centennial Education Association, 133 Pa.Cmwlth. 382, 576 A.2d 99 (1990) reached a similar decision. In Centennial, four professional employees who had resigned their positions were later rehired by the school district. At the time of rehiring, the employees were placed on the salary schedule at the same level as newly hired teachers. The Association filed grievances on behalf of the four teachers alleging that they had been placed on the salary schedule at a level lower than that required by the collective bargaining agreement. The arbitrator concluded that the collective bargaining agreement required that rehired teachers were entitled to credit for the prior years of teaching within the District under Sections 1142 [333]*333and 1149 of the School Code. The Commonwealth Court upheld the arbitrator’s decision, finding that the arbitrator’s award drew its essence from the collective bargaining agreement.5
The District instead relies on Wildrick v. Board of Directors of Sayre Area School District, 491 Pa. 25, 417 A.2d 617 (1980). The District’s reliance on Wildrick is misplaced as it has no relevance to the present dispute. Wildrick addressed the issue of whether the minimum salaries set forth in the School Code must be used in calculating salaries under a local salary schedule, even though the local salary schedule paid salaries above the state mandated minimum. In an assumpsit action against the district, the teachers claimed that they were entitled to placement on the local salary schedules at the corresponding step in the School Code commensurate with their salaries. The Wildrick court properly rejected the teachers’ argument, finding that the district was not required to apply to its local salary schedule that step in the statutory schedule which was intended by the Legislature to determine the minimum pay for teachers.
Wildrick is inapplicable to the present matter because the professional employees in this case are not claiming that their placement on the salary schedule is determined by the salary steps in the School Code, irrespective of the employees’ years of experience within that district. Instead, the Association is arguing only that Sections 1142 and 1149 require the District to credit the teachers for years of past service within the District. Thus, the Wildrick court’s discussion of a district’s [334]*334obligations under Section 1142, regarding an issue very different from the one before us, provides no guidance.
In the present case, the Grievants are statutorily protected against losing credit for previous service under Section 1142 of the School Code, a protection that is incorporated into the collective bargaining agreement. The arbitrator’s award denying credit for past service is violative of the School Code, and thus, violative of the agreement. Thus, the award does not derive its essence from the collective bargaining agreement. We hereby reverse the order of Commonwealth Court and reinstate the order of the Court of Common Pleas of Union County.6
[335]*335Justice NEWMAN did not participate in the consideration [336]*336or decision of this case.
Justice ZAPPALA files a dissenting opinion in which Chief Justice FLAHERTY joins.