N.Y. Comp. Codes R. & Regs. tit. 12 § 257.1
In the event that an employer and a labor organization have failed to achieve an agreement, either the employer or the labor organization, or both acting jointly, may notify the board in writing of the existence of an impasse. The notification, or declaration of impasse, must be signed by the representative of the declaring party, or where the parties are jointly declaring impasse, the representative of each party. The notification shall be filed electronically with the director of conciliation (see section 250.11 of this Title). Upon receipt of the notification of an impasse in collective bargaining, the board may appoint a mediator from a list of qualified persons maintained by the board to assist the parties to effectuate a voluntary resolution of the impasse. It is the policy of SERA that the board shall consider and make the parties aware of the availability of federal and other mediation services, and shall give priority in providing mediation services to those parties without access to those other services.
N.Y. Comp. Codes R. & Regs. Tit. 12 § 257.1