N.Y. Comp. Codes R. & Regs. tit. 8, § 30-3.16
(b) A district requesting a variance from one or more provisions of this Subpart and their approved evaluation plan must submit such request for approval on a form and in a timeframe prescribed by the commissioner. The commissioner shall approve or reject the variance application. The variance application shall include, but not be limited to:
(6) a description of how the district will assess the effectiveness of the implementation of the variance.
(c) Conditions.
Variance approvals are subject to the following conditions:
(7) prior to or with the submission of a variance application, the district must submit and receive approval of an evaluation plan that complies with all requirements of Education Law section 3012-d and Subpart 30-3 of this Subpart provided, however, that a district may, subject to collective bargaining to the extent required under article 14 of the Civil Service Law, notify the department in its variance application that it intends to carry forward its currently approved APPR plan in lieu of submitting a new evaluation plan to the department.
(d) Implementation timeframe.
(4) Notwithstanding the timeframes contained in paragraphs (1) and (2) of this subdivision, upon a finding by the commissioner of extraordinary circumstances, variance applications approved after December 1st of a school year may be implemented in that school year.
(e) Revocation and non-renewal of variance.