OPINION BY
Judge McCULLOUGH.
We consider here whether the estate of a claimant who paid her property taxes for the tax claim year, and was otherwise eligible for a rebate under the Senior Citizens Property Tax and Rent Rebate Assistance Act (Act)1, but died before December 31 of the claim year, should still be entitled to a rebate. The Act provides rebates for a portion of real estate taxes and rents to claimants who meet certain age and income qualifications. The regulations of the Pennsylvania Department of Revenue (Department) relating to this Act also permit the personal representative of a claimant’s estate to seek the rebate, provided that the claimant survived the entire claim year. See Sections 401.1(iv) and 401.43(a) of the regulations, 61 Pa.Code §§ 401.1(iv), 401.43(a). These regulations permitting estates to obtain the rebate have been in effect, and essentially remained unchanged, for nearly four decades. (R.R. at 69a, 147a.)
In this regard, presently before the Court is the application of Charles Mus-carella, Executor of the Estate of Josephine Carbo (Decedent), on behalf of the Estate and the class that he represents (together Muscarella),2 for entry of judgment on liability only, as well as a cross-application for summary relief filed on behalf of the Commonwealth. In his application, Muscarella seeks an order declaring sections 401.1(iv) and 401.43(a) of the Department’s regulations invalid insofar as they limit a personal representative of an estate from claiming a property tax rebate for a decedent who did not live during some part of the year next succeeding the calendar year for which the rebate is claimed. In its application, the Commonwealth seeks an order declaring that estates are ineligible for the property tax or rent rebate because the Act does not define the term “claimant” to include estates and that the aforementioned regulations are invalid to the extent they are inconsistent with the language of the Act.
For the reasons set forth below, we construe the Act as allowing a decedent’s estate to pursue a claim for a rebate under the Act so long as the decedent meets any one of the three eligibility criteria set forth in the definition of “Claimant” under section 1303 of the Act, 53 P.S. § 6926.1303. We do not construe the Act as limiting the right of estates to file a claim only where the decedent lived throughout the entirety of the tax year for which the property tax or rent rebate is sought. We, therefore, will grant Muscarella’s application for entry of judgment on the issue of liability only and deny the Commonwealth’s cross-application for summary relief.
Facts and Procedural History
The parties stipulated to the following facts. Before her death, Decedent owned [970]*970premises located at 434 Perm Road, Plymouth Township, Norristown, PA. For 2008 and some years prior thereto, Decedent paid property taxes for the premises and filed and obtained property tax rebates under the Act. Prior to her death on November 13, 2009, Decedent paid her 2009 property taxes in the amount of $2,183.94. On June 23, 2010, Muscarella filed a property tax rebate claim, Form PA-1000, with the Department.3
On July 30, 2010, the Department denied Muscarella’s claim for the 2009 property tax rebate because Decedent did not survive for the entire 2009 tax year. Mus-carella filed an appeal with the Department’s Board of Appeals, but his appeal was denied. The Board of Appeals cited section 401.43 of the Department’s regulations as the basis for its decision. Muscar-ella then filed a petition for review with the Board of Finance and Revenue (Board). However, by decision mailed on December 17, 2010, the Board sustained the decision of the Board of Appeals, also citing section 401.43, and Muscarella filed a petition for review with this Court.
Shortly thereafter, Muscarella filed a motion for certification of a class of claimants. Following an answer by the Commonwealth and argument, this Court, by decision and order dated January 11, 2012, granted Muscarella’s motion and defined the class as those persons or estates who filed property tax rebate claims for the years 2003 through 2008, and who were otherwise eligible for a rebate, but who had died on or before December 31 of the applicable tax year.4
On November 27, 2012, Muscarella filed an application for entry of judgment on liability only, seeking to declare sections 401.1(iv) and 401.43 of the Department’s regulations, as well as the instructions to the PA-1000 claim form, insofar as they define a claimant as having lived the entire year during which a rebate is sought, invalid and violative of the Equal Protection and Due Process Clauses of the United States and Pennsylvania Constitutions. Muscarella further requested a hearing as to damages.
Approximately two weeks later, the Commonwealth filed its own application for relief noting that the Act does not include an estate in its definition of a “claimant.” The Commonwealth seeks an order declaring that estates are not eligible for a property tax rebate and that the aforementioned regulations are invalid to the extent that they are inconsistent with the language of the Act.
Discussion
I. Statute and Regulations
We begin with a review of the relevant statutory and regulatory sections. Section 1301 of the Act states that the purpose of the Act was to provide “senior citizens with assistance in the form of property tax and rent rebates.” 53 P.S. § 6926.1301. Both the current Act and its predecessor, the Senior Citizens Rebate and Assistance Act, define a “claimant” as a person who files a claim for a property tax or rent rebate and who meets the requisite statutory requirements. Section 1303 of the current Act defines an eligible “claimant” as:
A person who files a claim for property tax rebate or rent rebate in lieu of property taxes and:
[971]*971(1) was at least 65 years of age or whose spouse, if a member of the household, was at least 65 years of age during a calendar year in which real property taxes or rent were due and payable;
(2) was a widow or widower and was at least 50 years of age during a calendar year or part thereof in which real property taxes or rent were due and payable; or
(3) was a permanently disabled person 18 years of age or older during a calendar year or part thereof in which the real property taxes or rent were due and payable.
53 P.S. § 6926.1303.5
As early as 1974, the Department proposed regulations to the Act’s predecessor recognizing that estates are included in the definition of “claimant,” with the limitation that the decedent must have lived during some part of the year next succeeding the calendar year in which the rebate/assistance was sought. These regulations were ultimately adopted in 1976 and remain virtually unchanged in their present form. Currently, section 401.1(iv) of the Department’s regulations provides, in pertinent part, as follows:
A claim for a property tax rebate or a rent rebate in lieu of property taxes may be filed by the personal representative of a decedent’s estate if, and only if, the decedent lived during some part of the year next succeeding the calendar year for which a rebate is claimed. 61 Pa. Code § 401.1(iv).
Section 401.43(a) similarly provides that: A claim for a property tax rebate or rent rebate in lieu of property taxes may be filed by the personal representative of a decedent’s estate if, and only if, the decedent were alive on or after January 1 of the year next succeeding the calendar year for which a rebate is claimed.
61 Pa.Code § 401.43(a). The most recent 2012 instructions for the PA-1000 claim form relating to a deceased claimant mirror these regulations, stating that, “[t]o be eligible for a rebate, the claimant must have lived during all of [the tax year]. If a claimant died on or after Jan. 1 [of the succeeding year], the department will pay the rebate to the claimant’s spouse, estate, or personal representative.”6
During the course of the present litigation, Muscarella submitted numerous discovery requests to the Commonwealth seeking any documentation or information supporting this limitation, but the Commonwealth responded that no such documentation or information exists.7 As a [972]*972result, Muscarella argued that the regulations were violative of the Equal Protection and Due Process Clauses of the United States and Pennsylvania Constitutions. While the Commonwealth has since changed its position, the Commonwealth initially responded that the limitation contained within these regulations was reasonable, in furtherance of the intent of the Act, and rationally related to the purpose of the Act. We disagree with the Commonwealth.
II. United States and Pennsylvania Constitutions Equal Protection
The Equal Protection Clause of the Fourteenth Amendment provides that no State shall “deny to any person within its jurisdiction the equal protection of the laws.” U.S. Const, amend. XIV, § 1. Likewise, Article 1, Section 26 of the Pennsylvania Constitution provides that “[njeither the Commonwealth nor any political subdivision thereof shall deny to any person the enjoyment of any civil right, nor discriminate against any person in the exercise of any civil right.” Pa. Const, art. I, § 26.8 “The essence of the constitutional principle of equal protection under the law is that like persons in like circumstances will be treated similarly.” Curtis v. Kline, 542 Pa. 249, 254, 666 A.2d 265, 267 (1995) (citing Laudenberger v. Port Authority of Allegheny County, 496 Pa. 52, 436 A.2d 147 (1981)). However, “[t]he prohibition against treating people differently under the law does not preclude the Commonwealth from resorting to legislative classifications ... provided that those classifications are reasonable rather than arbitrary and bear a reasonable relationship to the object of the legislation.” Id. at 255, 666 A.2d at 268 (citations omitted).
In other words, a legislative classification of persons “must rest upon some ground of difference which justifies the classification and have a fair and substantial relationship to the object of the legislation.” Id. Applying these principles to the present case, in order to treat claimants who die during the claim year differently from claimants who survive the claim year, the Commonwealth would be required to put forth persuasive evidence that such classification is reasonable rather than ar[973]*973bitrary and bears a reasonable relationship to the object of the legislation. Id.
Due Process
Regarding due process, “[t]he due process standards of United States and Pennsylvania Constitutions are essentially the same.” City of Philadelphia v. Pennsylvania Insurance Department, 889 A.2d 664, 670 (Pa.Cmwlth.2005). The Due Process Clause of the Fourteenth Amendment provides that no State shall “deprive any person of life, liberty, or property, without due process of law.” U.S. Const. amend. XIV, § 1. Due process under the Pennsylvania Constitution emanates from a number of provisions, including Article I, Sections 1, 9, and 11.9
Under the due process provisions of the Fourteenth Amendment, a person has a right to a due process hearing when the following two-prong test is met: (1) the challenged action has caused that party an injury in fact, economic or otherwise, and (2) when the interest asserted by the plaintiff is within the zones of interests sought to be protected or regulated by the statute or constitutional guarantee in question. City of Philadelphia v. Pennsylvania Insurance Department. “Stated a bit differently, under the Pennsylvania Constitution, a person is only entitled to due process protections when there is a legitimate claim of entitlement to a property interest or other protected interest.” Id. at 670. In summary, under either the United States or Pennsylvania Constitutions, “once a party is determined to have a property interest or interest in the outcome of the litigation, that person has standing to challenge the governmental action and is entitled to a due process hearing.” Id.
Rational Basis Test
We next address the proper level of scrutiny to be applied in this case. “A statute that intrudes upon a citizen’s fundamental right is subject to strict scrutiny.” Johnston v. Township of Plumcreek, 859 A.2d 7, 11 (Pa.Cmwlth.2004), appeal denied, 583 Pa. 684, 877 A.2d 463 (2005) (citing Griswold v. Connecticut, 381 U.S. 479, 85 S.Ct. 1678, 14 L.Ed.2d 510 (1965); Stenger v. Lehigh Valley Hospital Center, 530 Pa. 426, 609 A.2d 796 (1992)). Where, as here, the legislative classification does not implicate a fundamental right or involve a suspect class, the proper level of scrutiny is a rational basis test. Kelley v. State Employees’ Retirement Board, 593 Pa. 487, 932 A.2d 61 (2007), cert. denied, 552 U.S. 1185, 128 S.Ct. 1260, 170 L.Ed.2d 69 (2008). In applying the rational basis test, a court will consider: 1) whether there exists any legitimate state interest; and 2) whether the legislation is reasonably related to promoting a legitimate state interest. Association of Settlement Companies v. Department of Banking, 977 A.2d 1257 (Pa.Cmwlth.2009). The burden is on the challenger to show that the legis[974]*974lation serves no legitimate state interest. Id.
In the present case, Muscarella established the lack of any legitimate state interest in treating claimants who die during the claim year any differently from claimants who survive the entire claim year. Indeed, the record, namely the interrogatories Muscarella submitted to the Commonwealth, support such a conclusion. In these interrogatories, the Commonwealth could not identify any evidence or information that would provide justification, rational or otherwise, for requiring a claimant to survive the entire claim year. Under either situation, the deceased individual does not receive the rebate; rather, the rebate goes to the estate.
The very language of these regulations, as well as the instructions to the PA-1000 claim form, expressly prohibit estates like that of Decedent and others similarly situated from even filing a claim for rebate if the claimant does not survive the entire claim year, without any means of challenging their exclusion. Indeed, the regulations state that a claim may be filed “if, and only if,” the decedent survives into the succeeding claim year and the instructions state that “no claim may be filed” if the claimant died within the claim year. Hence, filing a claim or filing an appeal of a denial is futile, thereby denying individuals such as Muscarella and all other members of the class their right to due process to protect the legitimate property interest in obtaining a rebate under the Act.
The Commonwealth has failed to produce evidence to support a legitimate state interest and that the legislation is reasonably related to promoting such interest, or the availability of an adequate method for claimants to protect their property interests. It has failed to establish a rational basis for treating the estates of deceased persons who live to January 1st of the succeeding claim year any differently than those who die on or before December 31st of the claim year. Also, the Commonwealth has failed to provide a basis for the current regulations. Therefore, we must conclude that the current regulations, as well as the instructions to the PA-1000 claim form, insofar as they limit a personal representative of an estate from claiming a property tax rebate for a decedent who did not live during some part of the year next succeeding the calendar year for which the rebate is claimed, violate the Equal Protection and Due Process Clauses of the United States and Pennsylvania Constitutions.
III. Commonwealth’s Change of Position Regarding Validity of Regulations
Next, we address the Commonwealth’s assertion that all estates are prohibited from receiving rebates. The Commonwealth now maintains that, the Court should disregard the regulations permitting rebates to estates, in essence abandoning its prior position that the regulations are reasonable and in furtherance of the intent of the Act. Specifically, the Commonwealth argues that the definition of “claimant” under section 1303 of the Act is clear and unambiguous and does not include estates. Again, we cannot agree.
As noted above, section 1303 defines a “claimant” as a “person who files a claim for property tax rebate or rent rebate in lieu of property taxes....” 53 P.S. § 6926.1303. However, section 1303 does not include a definition of the term “person.” When a term is not defined in a statute, we resort to the definitions provided in section 1991 of the Statutory Construction Act of 1972, 1 Pa.C.S. § 1991. Malt Beverages Distributors Association v. Pennsylvania Liquor Control Board, 601 Pa. 449, 974 A.2d 1144 (2009) (where a [975]*975latent ambiguity exists in a statute, we resort to the canons of statutory construction); Farago v. Sacred Heart General Hospital, 522 Pa. 410, 562 A.2d 300 (1989) (where a term is not defined in statute, we look to the definitions section of the Statutory Construction Act). Section 1991 defines “person” as including “a corporation, partnership, limited liability company, business trust, other association, government entity (other than the Commonwealth), estate, trust, foundation or natural person.” 1 Pa.C.S. § 1991 (emphasis added). Clearly, the definition of “person” includes an “estate.” Because the term “claimant” as used in section 1303 of the Act includes a “person,” we must construe the definition of “claimant” under the Act as including estates.
In addition, section 1303 of the Act sets forth three different scenarios whereby a person would qualify as a “claimant,” all of which must occur “during a calendar year in which real property taxes or rent were due and payable.” 53 P.S. § 6926.1303 (emphasis added). As noted above, these scenarios include a person attaining the age of 65, a widow or widower at least 50 years of age, or a permanently disabled person 18 years of age or older. However, similar to the use of the term “person” above, the Act does not include a definition of “during.” Likewise, the Statutory Construction Act does not define this term. In accordance with section 1903(a) of the Statutory Construction Act, “[wjords and phrases shall be construed according to rules of grammar and according to their common and approved usage....” 1 Pa. C.S. § 1903(a). “During” is generally defined as “throughout the continuance or course of’ or “at some time in the course of.” Webster’s Third New International Dictionary 703 (2002) (emphasis added). As this definition reflects two distinct meanings, we must conclude that this is a matter requiring further legislative resolution and cannot support the Commonwealth’s position at this time.10
The Act is silent as to the earliest a claim may be filed, providing only that it “shall be filed ... on or before the 30th day of June of the year next succeeding the end of the calendar year in which real property taxes or rent was due and payable.” 53 P.S. § 6926.1305; 61 Pa.Code § 403.1. In other words, if a senior citizen lives at least until January 1 of the year succeeding the tax year and then dies, his estate has until June 30 to file for the rebate. However, if a senior citizen dies [976]*976before January 1, the estate is not entitled to the rebate.
In its denial of property tax relief for senior citizens long recognized by the Department, the dissent sides with the Commonwealth and would deny such relief to the estate of anyone who has the misfortune to die before he or she could personally file a rebate claim.11 In so doing, the dissent disregards the fact that for 37 years the Commonwealth recognized that a rebate claimant included the estate of the eligible senior citizen, albeit with the arbitrary requirement that one who would otherwise be eligible for relief under the statute must live at least one nanosecond into the year subsequent to the one in which property taxes had been paid.
The dissent also overlooks the fact that since the Commonwealth first proposed regulations in 1974 stating that estates are included in the definition of “claimant,” the General Assembly amended the original 1971 Senior Citizens Rebate and Assistance Act at least ten times over the years before repealing and replacing it with the new Act in 2006, and never amended it to deny estates the right to file for the rebate. The case law of the Commonwealth has made it clear when, as is the case here, statutory language is not explicit, legislative intent may be ascertained through administrative interpretation, and such an interpretation, not being disturbed by the legislature, is an appropriate guide to legislative intent. See Carlson Mining Company v. Department of Environmental Resources, 163 Pa.Cmwlth. 141, 639 A.2d 1332, 1335 (1994); Nationwide Mutual Insurance Company v. Foster, 134 Pa.Cmwlth. 585, 580 A.2d 436, 438 (1990); Estate of Kuljian v. Tax Review Board City of Philadelphia, 111 Pa.Cmwlth. 451, 533 A.2d 1135, 1137 (1987); Community Car Pool Service, Inc. v. Pennsylvania Public Utility Commission, 111 Pa.Cmwlth. 73, 533 A.2d 491, 494 (1987); Carol Lines, Inc. v. Pennsylvania Public Utility Commission, 83 Pa.Cmwlth. 393, 477 A.2d 601, 602 (1984). See also 1 [977]*977Pa.C.S. § 1921(c)(8). Given the General Assembly’s refusal to deny estates the right to file property tax rebate claims in the five decades of the existence of the statute in one form or another, which encompasses the ten amendments and a repeal, and a replacement statute as noted above, one may safely conclude that the legislative intent is to include estates within the ambit of rebate relief. In light of such, it is inappropriate to usurp the role of the legislature and eliminate by judicial fiat, the right of estates to claim property tax rebate relief.
By recognizing the unconstitutionality of the distinction applied to senior citizens of survivability to file a claim, the purposes of the Act are not only being followed but are being enhanced. Furthermore, it has been the Commonwealth who permitted estates to file for and receive rebates as long as the senior citizen lived until January 1 of the year succeeding the tax year. In so doing, the Commonwealth permitted estates of senior citizens to receive such a benefit and now attempts to undo its own actions.
We emphasize that the Department itself made a determination nearly 40 years ago that an estate may qualify as an eligible “claimant” under the Act and it enacted regulations to effectuate that determination. However, the Department placed a condition on an estate’s receipt of the rebate, a condition which we determined above does not pass constitutional muster. Contrary to the dissent, we are neither amending the existing regulations nor drafting new regulations that apply to a previously unrecognized class of claimants. Additionally, the dissent states that “the question that both Petitioner and Revenue pose in their cross-applications for summary relief, is whether a decedent’s estate — whether any decedent’s estate — may file a claim under the Act. Respectfully, I do not believe the majority fully analyzes this question....” (Dissent op. at 980). Respectfully, the dissent presents a question that has already been answered. Estates have been receiving rebates for nearly four decades. We are simply invalidating the condition imposed by the Department precluding certain estates from obtaining the rebate. The Department is free to amend or repeal the regulations, provided it does so in an appropriate manner as discussed below.
Commonwealth Documents Law
Moreover, to the extent that the Commonwealth seeks to void the Department’s current regulations, such action is precluded by the Commonwealth Documents Law (CDL).12 The CDL sets forth specific, mandatory procedures with regard to the legality, amendment, or repeal of administrative regulations. Specifically, section 205 of the CDL provides that “[a]ll administrative regulations and changes therein shall be approved as to legality by the Department of Justice” and that “[t]he decision of the Department of Justice shall be final and shall not be subject to any form of judicial review at the instance of the agency....” 45 P.S. § 1205. Additionally, section 201 of the CDL requires an agency to provide “public notice of its intention to ... amend or repeal any administrative regulation” and section 202 requires an agency to “review and consider any written comments” before “taking action upon any administrative regulation or change therein.”13 45 P.S. §§ 1201, 1202.
[978]*978Here, the Commonwealth approved the current regulations because the Pennsylvania Bulletins in which the regulations allowing estates to recover rebates were first published stated that the regulations were to be forwarded to the Department of Justice to be approved for legality. See Pa. Bulletin 284-85 (February 15, 1975); Pa. Bulletin 392-93 (February 28, 1976). The regulations were then set forth in the Pennsylvania Code, which creates a rebuttable presumption that the regulations were in fact approved. See Section 905(2) of the CDL, 45 Pa.C.S. § 905(2) (stating that the publication of any document in the Code creates a rebuttable presumption that the document “was approved as to legality”). Nonetheless, the Commonwealth seeks to void the current regulations by circumventing the very same public notice and comment requirements of the CDL which the Commonwealth complied with in enacting them. Thus, this Court is not the proper venue for the relief the Commonwealth seeks, i.e., attempting to amend or void the current regulations.
Conclusion
The Department has been providing rebates to estates pursuant to the regulations it properly enacted as far back as 1976. The Commonwealth now seeks to void and/or interpret the current regulations differently so as to preclude all estates from receiving rebates. Because section 1303 of the Act refers to a “person,” which we interpret as including an “estate” under section 1991 of the Statutory Construction Act, and the CDL precludes the Commonwealth from attempting to void the applicable regulations in the course of this litigation, the Commonwealth’s arguments must fail. The resolution presently sought by the Commonwealth rests in the hands of the General Assembly and/or the Department.
Accordingly, because the regulations as written, and applied, violate the Equal Protection and Due Process Clauses of the [979]*979United States and Pennsylvania Constitutions, and we construe the Act as allowing a decedent’s estate to pursue a claim for a rebate so long as the decedent meets any one of the three eligibility criteria set forth in the definition of “Claimant” under section 1303 of the Act, coupled with the CDL prohibition discussed above, we grant Muscarella’s application for entry of judgment on liability only and deny the Commonwealth’s cross-application for summary relief.
ORDER
AND NOW, this 14th day of March, 2014, we grant the application of Charles Muscarella, on behalf of himself individually as Executor of the Estate of Josephine Carbo and on behalf of the class that he represents, for entry of judgment on liability only, and deny the Commonwealth’s cross-application for summary relief. The specific portions of sections 401.1(iv) and 401.43(a) of the regulations of the Pennsylvania Department of Revenue (Department), 61 Pa.Code §§ 401.1(iv), 401.43(a), and the instructions to the PA-1000 property tax and rent rebate claim form, insofar as they limit a personal representative of an estate from claiming a property tax rebate for a decedent who did not live during some part of the year next succeeding the calendar year for which the rebate is claimed, are hereby declared invalid.