Md. Code, Land Use § 4–101

(a) It is the policy of the State that:

(1) the orderly development and use of land and structures requires comprehensive regulation through the implementation of planning and zoning controls; and

(2) planning and zoning controls shall be implemented by local government.

(b) To achieve the public purposes of this regulatory scheme, it is the policy of the General Assembly and the State that local government action will displace or limit economic competition by owners and users of property through the planning and zoning controls set forth in this division and elsewhere in the public general and public local laws.