(a) When any county has adopted an official map in accordance with the terms of this article, a certified copy of the map and the ordinances adopting it shall be sent to every municipality within said county. All amendments shall be sent to the aforementioned municipalities. The powers of the governing bodies of counties to adopt, amend and repeal official maps shall be limited to land and watercourses in those municipalities wholly or partly within the county which have no official map in effect at the time an official map is introduced before the governing body of the county, and until the municipal official map is in effect. The adoption of an official map by any municipality, other than a county, whose land or watercourses are subject to county official mapping, shall act as a repeal protanto of the county official map within the municipality adopting such ordinance. Notwithstanding any of the other terms or conditions of this section the county official map shall govern as to county streets and public grounds, facilities and improvements, even though such streets or public grounds, facilities and improvements are located in a municipality which has adopted an official map.

(b) When a municipality proposes to adopt an official map, or any amendment thereto, a copy of the map and the proposed ordinance adopting it, or any amendment thereto, shall be forwarded for review to the county planning agency, or if no such agency exists to the governing body of the county at the same time it is submitted for review to the municipal planning agency. The comments of the county planning agency shall be made to the governing body of the municipality within 45 days, and the proposed action shall not be taken until such comments are received. If, however, the planning agency fails to act within 45 days, the governing body may proceed without its comments.

(c) Additionally, if any municipality proposes to adopt an official map, or amendment thereto, that shows any street or public lands intended to lead into any adjacent municipality a copy of said official map or amendment shall be forwarded to such adjacent municipality for review and comment by the governing body and planning agency of the adjacent municipality. The comments of the adjacent municipality shall be made to the governing body of the municipality proposing the adoption within 45 days, and the proposed action shall not be taken until such comments are received. If, however, the adjacent municipality fails to act within 45 days, the governing body of the proposing municipality may proceed without its comments. When a municipality adopts an official map, a certified copy of the map, the ordinance adopting it and any later amendments shall be forwarded, within 30 days after adoption, to the county planning agency or, in counties where no planning agency exists, to the governing body of the county in which the municipality is located. Additionally, if any municipality adopts an official map, or amendment thereto, that shows any street or public lands intended to lead into any adjacent municipality, a certified copy of said official map or amendment shall be forwarded to such adjacent municipality.