(a) A new municipality that is eligible to assume planning and zoning authority and the county commissioners or county council shall cooperate in developing the first comprehensive land use plan of the municipality.

(b) Unless the county commissioners or county council expressly approves otherwise, the initial zoning designations used by the municipality shall comply with §§ 4-104(e) and 4-516 of this title, including the 5-year zoning classification restriction.