Maryland Code, Land Use § 21-101

(1) the making of the appropriate general plan;

(2) any part, amendment, extension, or addition to the plan;

(3) the protection of and the carrying out of the plan;  and

(4) the exercise of any:

(1) guide and accomplish a coordinated, comprehensive, adjusted, and systematic development of the regional district;

(2) coordinate and adjust the development of the regional district with public and private development of other parts of the State and of the District of Columbia;  and

(3) protect and promote the public health, safety, and welfare.