N.Y. Real Prop. Law § 339-P
Simultaneously with the recording of the declaration there shall be filed in the office of the recording officer a set of the floor plans of the building showing the layout, locations, and approximate dimensions of the units, stating the declarants' names, and bearing the verified statement of a registered architect or licensed professional engineer certifying that it is an accurate copy of portions of the plans of the building as filed with and approved by the municipal or other governmental subdivision having jurisdiction over the issuance of permits for the construction of buildings. If such floor plans do not contain unit designations certified by the appropriate local tax authorities as conforming to the official tax lot number, there shall be filed in the office of the recording officer prior to the first conveyance of a unit a floor plan containing a unit designation certified by the appropriate local tax authority as conforming to the official tax lot number. It shall be the duty of the appropriate local tax authority to provide such number for each unit upon completion of such unit. If such plans do not include a verified statement by such architect or engineer that such plans fully and fairly depict the layout, location, unit designations and approximate dimensions of any particular unit or units as built, there shall be recorded prior to each first conveyance of such particular unit or units an amendment to the declaration to which shall be attached a verified statement of a registered architect or licensed professional engineer certifying that the plans theretofore filed, or being filed simultaneously with such amendment, fully and fairly depict the layout, location, unit designations and approximate dimensions of the particular unit or units as built. Such plans shall be designated "condominium", assigned a file number and kept on file by the recording officer. Such plans shall be indexed under the names of the declarants and in the block index if any. The record of the declaration shall contain a reference to the file number of the floor plans of the building affected thereby.
N.Y. Real Prop. Law § 339-P