N.Y. Comp. Codes R. & Regs. tit. 6, § 617.5
(b) Each agency may adopt its own list of Type II actions to supplement the actions in subdivision (c) of this section. No agency is bound by an action on another agency's Type II list. The fact that an action is identified as a Type II action in an agency’s procedures does not mean that it must be treated as a Type II action by any other involved agency not identifying it as a Type II action in its procedures. An agency that identifies an action as not requiring any determination or procedure under this Part is not an involved agency. Each of the actions on an agency Type II list must:
(c) The following actions are not subject to review under this Part:
(14) installation of solar energy arrays where such installation involves 25 acres or less of physical alteration on the following sites:
(15) installation of solar energy arrays on an existing structure provided the structure is not: