N.Y. Comp. Codes R. & Regs. tit. 6 § 606.130
Following the board's publication of notice that it will conduct a public hearing, and at least seven days prior to the commencement of that public hearing, any public corporation or person deeming themselves to have been aggrieved shall notify the board in writing regarding the basis for the requested modification to the apportionment. The aggrieved party's written complaint shall provide an estimate of the time necessary to present evidence at the apportionment grievance hearing and must be received by the board, at the address indicated on or before the date and time indicated in the board's published notice. The board shall cause to be published on its website a copy of each such written complaint.
N.Y. Comp. Codes R. & Regs. Tit. 6 § 606.130