N.Y. Gen. Mun. Law § 766
New officials of the consolidated local government entity required to be elected shall take office on the first Monday of January following the election designated in the joint consolidation agreement or elector initiated consolidation plan, as the case may be. At such election, the necessary officials of the consolidated local government entity shall be elected in accordance with the terms of the general law affecting entities of the kind or class of the consolidated local government entity. Except as otherwise specified in the joint consolidation agreement or elector initiated consolidation plan, all appointive officials of the consolidated local government entity thereafter shall be appointed by the individual or entity upon whom the power to appoint such officials is conferred by the terms of the general law affecting entities of the kind or class of the consolidated local government entity. Successors in office for such elected or appointed positions shall thereafter be elected or appointed at the time, in the manner and for the terms provided by the general law affecting entities of the kind or class of the consolidated local government entity.
N.Y. Gen. Mun. Law § 766