—Lahtinen, J.
Proceeding pursuant to CPLR article 78 (transferred to this Court by order of the Supreme Court, entered in Albany County) to review a determination of respondent Comptroller which denied petitioner’s application to participate in the 1997 retirement incentive.
Petitioner began employment with Westchester County in May 1971. From January 1993 to June 1997, she held a position as an annual salaried nurse with the Mobile Crisis Team of the Comprehensive Psychiatric Emergency Program at Westchester County Medical Center. On June 27, 1997, petitioner was “bumped” from her annual salaried position with the County because of a reduction in the work force, but rehired
As relevant here, chapter 41 of the Laws of 1997, as adopted by the County, provided County employees a retirement incentive if they were employed in an eligible title “continuously in the active service of [the County] from February 1, 1997 to the date immediately prior to the commencement date of the applicable open period” (L 1997, ch 41, § 5).* The County’s open period commenced on November 17, 1997, requiring petitioner to be in “active service” from February 1, 1997 until November 16, 1997 in order to be eligible for the incentive. Active service is defined by the statute as “service while being paid on the payroll” (L 1997, ch 41, § 1 [i]).
Respondent’s determination must be upheld if his interpretation of the controlling retirement statute is reasonable (see Matter of Leonard v Regan, 167 AD2d 790, 792; see also Sherman v New York State Teachers’ Retirement Sys., 50 NY2d 980, 981) and the underlying factual findings are supported by substantial evidence (see Matter of Foster v McCall, 248 AD2d 853, 853). Substantial evidence to support respondent’s determination that petitioner had a disqualifying break in service with the County was supplied by petitioner’s testimony that
Petitioner’s equitable estoppel argument is unavailing. Equitable estoppel cannot be used against respondent when correcting benefit allowances, even where, as here, retirement system employees gave erroneous information to a person contemplating retirement (see Matter of Smith v New York State & Local Retirement Sys., 199 AD2d 763, 764; Matter of Leyden v Regan, 179 AD2d 889, 890, lv denied 80 NY2d 754; Matter of Boudreau v Levitt, 67 AD2d 1053, 1054).
Cardona, P.J., Peters, Spain and Mugglin, JJ., concur. Adjudged that the determination is confirmed, without costs, and petition dismissed.
*.
An approved leave of absence without pay does not constitute a disqualifying break in service unless it exceeds 12 weeks (see L 1997, ch 41, § 1 W).