The Bureau of Engineering shall be the custodian of the Official
City Map. It shall be the duty of the City Engineer to maintain the
City Map and to register thereon all changes resulting from action
authorized by law. The City Map shall be filed in the office of the
City Engineer and certified copies thereof and of all changes thereto
shall be filed in the office of the Planning Commission.
No plat of a subdivision of land partly or wholly within the
City shall be filed with the County Clerk until it shall have been
approved by the Planning Commission and the approval thereof entered
on the plat by the Secretary thereof. Every plat approved by the City
Planning Commission shall, by virtue of such approval, be deemed to
be an amendment of or an addition to or detail of the Comprehensive
Plan and part thereof, if a Comprehensive Plan shall have been adopted
prior to such approval. If a Comprehensive Plan or part thereof shall
not have been adopted prior to such approval, then such plat so approved
shall be incorporated in and made a part of any Comprehensive Plan
thereafter adopted. Approval of a plat shall not be deemed to constitute
or affect an acceptance by the public of any street or other open
space shown upon the plat; however, the filing of an approved plat
shall constitute an irrevocable offer of dedication by the owner of
the land to the City of Troy of streets, roads or highways shown on
said plat and of land shown thereon as widened areas of existing streets,
roads or highways, and provided further that where such an approved
plat so filed shall amend or supersede in whole or in part the layout
of streets, roads, or highways shown on a previously filed plat, such
offer of dedication as to streets, roads or highways or widened areas
thereof shown on such superseded plat and not shown on such amending
plat shall be deemed withdrawn. Such Commission shall have all the
powers and be subject to all the duties of Article 3 of the General
City Law in relation to such plats. It shall be the duty of the Secretary
of that Commission to file with the County Clerk a certificate stating
that the Commission has been so authorized to approve plots. Such
certificate shall state also that the Secretary of the Commission
shall issue the certificate of the City on its failure to take action
on a plat whenever it is necessary to issue such a certificate, pursuant
to § 32 of the General City Law.