delivered the opinion of the court:
Plaintiff, Thomas Kaczka, appeals from the judgment of the circuit court confirming a decision by the Retirement Board of the Policemen’s Annuity and Benefit Fund of the City of Chicago (the Board), which denied his application for a reinstatement of a widower’s annuity benefit under the Illinois Pension Code (the Pension Code) (40 ILCS 5/5 — 101 et seq. (West Supp. 2007)). On appeal, plaintiff contends that: (1) his widower’s benefits were subject to mandatory reinstatement pursuant to section 5 — 147 of the Pension Code (40 ILCS 5/5 — 147 (West Supp. 2007)); (2) the Board’s 1992 decision awarding him a widower’s annuity was a final administrative order not subject to modification beyond the 35-day administrative review period under the Administrative Review Law (735 ILCS 5/3 — 103 (West 2006)); (3) the Board’s prior decision awarding him a widower’s annuity was not void; and (4) the Board erred in dismissing his claim that the Board violated his right to equal protection under federal and state law. For the following reasons, we affirm the decision of the Board.
*704BACKGROUND
On August 22, 1992, plaintiff married Carole E Lewandowski. At the time of their marriage, Carole had been a member of the Chicago Police Department for 11 years. On September 3, 1992, 12 days after the marriage, Carole died. Thereafter, plaintiff applied for, and was awarded, a widower’s annuity benefit under article 5 of the Pension Code. Ill. Rev. Stat. 1991, ch. 108½, par. 5 — 101 et seq.
Thereafter, on November 26, 1999, plaintiff remarried. In 2005, the Board suspended plaintiffs benefits based upon the then-existing provision in the Pension Code requiring that widower’s annuity benefits be suspended upon the remarriage of the surviving spouse. 40 ILCS 5/5 — 147 (West 2004). Plaintiff agreed to refund the overpayment as a result of funds he erroneously received between 1999 and 2005.
Subsequently, effective August 28, 2007, section 5 — 147 of the Pension Code was amended by Public Act 95 — 504 (Pub. Act 95 — 504, eff. August 28, 2007, amending 40 ILCS 5/5 — 147 (West Supp. 2007)). Under the new provision, a widower’s annuity is no longer subject to termination or suspension due to remarriage. Based upon this amendment, on October 29, 2007, plaintiff applied for reinstatement of his widower’s annuity.
After notice and an opportunity to be heard, the Board rendered its decision denying the reinstatement of a widower’s annuity. The Board determined that plaintiff did not qualify for reinstatement of a widower’s annuity under the Pension Code because at the time Carole died, plaintiff had been married to her for less than one year. Under the then-existing provisions of Article 5 of the Pension Code, a widower had “no right” to a widower’s annuity “if the marriage occurred less than one year prior to the policeman’s death.” Ill. Rev. Stat. 1991, ch. 108½, par. 5 — 146(a). Therefore, the Board concluded as follows:
“i) [Plaintiff] is not entitled to any current annuity benefits in that he does not qualify as a person entitled to benefits by reason of his marriage to [Carole]; and ii) since [plaintiff] is not entitled to benefits based on his marriage to [Carole], it must follow that there are no benefits to ‘resume’ and accordingly, the application submitted by [plaintiff] is denied.”
Plaintiff then filed a two-count complaint for administrative review in the circuit court. Count I of his amended complaint sought judicial review of the Board’s decision denying the reinstatement of his widower’s annuity benefit. In count II, plaintiff sought damages under section 1983 of the Civil Rights Act (42 U.S.C. §1983 (2006)), and article I, section 2 of the Illinois Constitution (Ill. Const. 1970, art. I, §2), alleging a violation of equal protection. The Board subsequently *705filed a motion to dismiss count II of the amended complaint pursuant to section 2 — 615 of the Illinois Code of Civil Procedure (735 ILCS 5/2 — 615 (West 2006)). On January 7, 2009, the circuit court granted the Board’s motion to dismiss count II. Thereafter, the circuit court entered a judgment on count I, confirming the decision of the Board denying plaintiffs application for reinstatement of a widower’s annuity benefit. Plaintiff now appeals.
ANALYSIS
The Board is governed by article 5 of the Pension Code, which governs the police pension fund for cities with a population of more than 500,000. 40 ILCS 5/5 — 108 (West 2006). Pursuant to section 5 — 228 (40 ILCS 5/5 — 228 (West 2006)), judicial review of the Board’s decision is governed by the Administrative Review Law (735 ILCS 5/3 — 101 et seq. (West 2006)). Accordingly, we review the decision of the administrative agency rather than the determination of the circuit court. Wade v. City of North Chicago Police Pension Board, 226 Ill. 2d 485, 504 (2007). In these cases, the applicable standard of review depends upon whether the question presented is one of fact or law or a mixed question of fact and law. Marconi v. Chicago Heights Police Pension Board, 225 Ill. 2d 497, 532 (2006). Here, where the salient facts are undisputed and the litigation turns on an issue of statutory construction, which is a question of law, our review is de novo. Roselle Police Pension Board v. Village of Roselle, 232 Ill. 2d 546, 552 (2009).
The essential question raised by this appeal is whether plaintiff is entitled to reinstatement of his widower’s annuity benefit under the relevant provisions of article 5 of the Pension Code. Plaintiff initially asserts that the Board erroneously denied his application for reinstatement because reinstatement of his benefits was mandatory under the amendment to section 5 — 147 of the Pension Code. 40 ILCS 5/5 — 147 (West Supp. 2007). That section provides, in pertinent part, as follows:
“[A]ny widow’s annuity that was previously terminated or suspended *** by reason of remarriage shall, upon application, be resumed as of the date of the application ***.” 40 ILCS 5/5 — 147(a) (West Supp. 2007).
Plaintiff contends that the use of the word “shall” denotes a clear expression of legislative intent to impose a mandatory obligation.
Nevertheless, it is also a fundamental principle of statutory construction that all provisions of an enactment are to be viewed as a whole and each provision must be interpreted in light of other relevant sections of the statute. Abrahamson v. Illinois Department of Professional Regulation, 153 Ill. 2d 76, 91 (1992). Thus, in considering whether plaintiff was entitled to reinstatement, the Board was also *706required to consider other relevant sections of the Pension Code. Section 5 — 146 specifically addresses a widower’s right to annuities. At the time of Carole’s death, that section provided in pertinent part as follows:
“§5 — 146. Wives and widows not entitled to annuities. The following wives or widows have no right to annuity from the fund:
(a) A wife or widow, *** of a policeman who dies in service, if the marriage occurred less than one year prior to the policeman’s death ***[.]” Ill. Rev. Stat. 1991, ch. 108½, par. 5 — 146(a).
Thus, where the marriage lasted less than one year prior to the death of the policeman, a widower had “no right” to an annuity from the fund. Here, unfortunately, Carole died 12 days after the marriage. Accordingly, plaintiff had “no right” to any annuity and, therefore, no right to any reinstatement of benefits under section 5 — 147. 40 ILCS 5/5 — 147 (West Supp. 2007).
Plaintiff argues that in rendering its decision, the Board erroneously modified its original 1992 decision, which had originally awarded him a widower’s annuity. Plaintiff cites several cases in support of the proposition that the Pension Code provides no authority to the Board to conduct a rehearing or modify its decision after the expiration of the 35-day filing period for review under the Administrative Review Law. Kosakowski v. Board of Trustees of the City of Calumet City Police Pension Fund, 389 Ill. App. 3d 381 (2009); Sola v. Roselle Police Pension Board, 342 Ill. App. 3d 227 (2003); Rossler v. Morton Grove Police Pension Board, 178 Ill. App. 3d 769 (1989).
These cases are procedurally and factually distinguishable from the present appeal. In Kosakowski, Sola and Rossler, the boards erroneously sought to rehear and modify a final order granting the plaintiffs’ benefits after each board had subsequently changed its interpretation of the Pension Code. Kosakowski, 389 Ill. App. 3d at 387; Sola, 342 Ill. App. 3d at 231; Rossler, 178 Ill. App. 3d at 774-75. For example, in Kosakowski, the board had argued that despite the 35-day review period, under section 3 — 144.2 of the Pension Code, the legislature granted it the authority to later deduct from future payments any overpayment due to misrepresentation, fraud or error, and the board argued that it had miscalculated the amount of the plaintiffs pension. Kosakowski, 389 Ill. App. 3d at 383; 40 ILCS 5/3 — 144.2 (West 2006). The court agreed with the board in principle, but under the facts presented found that the board’s change in interpretation of the Pension Code did not qualify as an “error” within the meaning of section 3 — 144.2 of the Code. Kosakowski, 389 Ill. App. 3d at 387. Therefore, the court held that under the Administrative Review Law, the board lacked jurisdiction to reconsider or modify a final adminis*707trative decision granting a disability pension after the 35-day review period provided for under the statute. Kosakowski, 389 Ill. App. 3d at 383-84.
Unlike Kosakowski, Sola and Rossler, here, the Board is not seeking to rehear or modify the substance of its original order in which it granted plaintiff a widower’s annuity in 1992. Rather, plaintiff’s benefits were subsequently suspended by operation of law due to his remarriage pursuant to section 5 — 147 of the Pension Code as it then existed. 40 ILCS 5/5 — 147 (West 2004). The only issue before the Board in this case is a review of plaintiff’s new application seeking a reinstatement of a widower’s annuity based upon a further change in the law in 2007. The Board was not authorized to reinstate his widower’s annuity in 2007 because it correctly determined that under the Pension Code plaintiff had “no right” to benefits and, therefore, prospectively there was nothing to “resume.”
Next, plaintiff contends that the circuit court erred in granting the Board’s motion to dismiss count II of his complaint pursuant to section 2 — 615 of the Code. 735 ILCS 5/2 — 615 (West 2006). A section 2 — 615 motion to dismiss tests the legal sufficiency of the complaint. Napleton v. Village of Hinsdale, 229 Ill. 2d 296, 305 (2008). On review, the question is whether the allegations of the complaint, when construed in the light most favorable to the plaintiff, are sufficient to establish a cause of action upon which relief may be granted. Napleton, 229 Ill. 2d at 305. Illinois is a fact-pleading jurisdiction, and a plaintiff must allege facts sufficient to bring his claim within the cause of action asserted. Napleton, 229 Ill. 2d at 305. Conclusions of fact or law unsupported by any allegation of specific facts on which these conclusions rest are insufficient to withstand a motion to dismiss. Pooh-Bah Enterprises, Inc. v. County of Cook, 232 Ill. 2d 463, 473 (2009). Our review of an order granting a section 2 — 615 motion to dismiss is de novo. Napleton, 229 Ill. 2d at 305.
Plaintiff essentially alleges that the Board, through its trustees, violated his right to equal protection under federal and state law because it granted 34 applications for reinstatement of widow’s benefits to individuals similarly situated to him. Plaintiff maintains that he has sufficiently alleged a “class-of-one” equal protection violation.
To state a cause of action under this theory, either under federal or state law, plaintiff must allege that he was treated differently from others who were similarly situated and that there is no rational basis for the difference in treatment. Village of Willowbrook v. Olech, 528 U.S. 562, 564, 145 L. Ed. 2d 1060, 1063, 120 S. Ct. 1073, 1074 (2000); In re Adoption of K.L.P., 198 Ill. 2d 448, 466 (2002) (the essential test *708of equal protection is whether the government deals with similarly situated individuals in a similar manner without a rational basis); Jacobson v. Department of Public Aid, 171 Ill. 2d 314, 322 (1996) (equal protection analysis is identical under the United States and Illinois Constitutions). Here, plaintiff has not pled any facts to support the conclusion that there were others situated similarly to him. He does not allege that any of the other 34 people whose pensions were reinstated had been married for less than one year when their spouses died. Accordingly, the circuit court properly granted the Board’s motion to dismiss count II of the amended complaint.
Lastly, plaintiff argues that the circuit court erred in granting the Board’s motion to expunge a document introduced by plaintiff that was not part of the administrative record. Specifically, plaintiff introduced a letter from the Board as evidence that the Board was aware of his remarriage as of March 2001 in response to the Board’s finding that it did not learn of plaintiffs remarriage until May 2005. Plaintiff argues that the document should have been part of the administrative record and the Board failed to include it.
Section 3 — 110 of the Administrative Review Law (735 ILCS 5/3— 110 (West 2006)) provides that in any administrative review action, review “shall extend to all questions of law and fact presented by the entire record before the court. No new or additional evidence in support of or in opposition to any finding, order, determination or decision of the administrative agency shall be heard by the court.” 735 ILCS 5/3 — 110 (West 2006). The letter was not part of the record before the Board. Moreover, even if it should have been made a part of the record by the Board, whether the Board was aware of his remarriage in 2001 was not relevant to the issues before the Board or the court on review. Accordingly, we find no error.
For all of the foregoing reasons, we affirm the judgment of the circuit court, which confirmed the Board’s decision to deny plaintiffs application for reinstatement of a widower’s annuity.
Affirmed.
KARNEZIS, J., concurs.