The applicant shall supply the details of the analysis in the application and such supporting information, as may be requested by the board or, in the exercise of federally delegated or approved environmental permitting authority, the department of environmental conservation, necessary to show compliance with the requirements of subparagraphs (i) through (iv) of this paragraph. The board may extend the deadline in extraordinary circumstances by no more than three months in order to give consideration to specific issues necessary to develop an adequate record. The board shall render a final decision on the application by the aforementioned deadlines unless such deadlines are waived by the applicant. If, at any time subsequent to the commencement of the hearing, there is a material and substantial amendment to the application, the deadlines may be extended by no more than three months, unless such deadline is waived by the applicant, to consider such amendment.
N.Y. Pub. Serv. Law § 165