Maryland Constitution of 1867 Art. 11-E, § 6

All charter provisions, or amendments thereto, adopted under the provisions of this Article, shall be subject to all applicable laws enacted by the General Assembly; except that any local laws, or amendments thereto, relating to the incorporation, organization, government, or affairs of any municipal corporation and enacted before this Article becomes effective, shall be subject to any charter provisions, or amendments thereto, adopted under the provisions of this Article. Any local law, or amendments thereto, relating to the incorporation, organization, government, or affairs of any municipal corporation and in effect at the time this Article becomes effective, shall be subject to any applicable State law enacted after this Article becomes effective. All laws enacted by the General Assembly and in effect at the time this Article becomes effective, shall remain in effect until amended or repealed in accordance with the provisions of this Constitution. Nothing in this Article shall be construed to authorize any municipal corporation, by any amendment or addition to its charter, to permit any act which is prohibited by the laws of this State concerning the observance of the Sabbath Day or the manufacture, licensing or sale of alcoholic beverages.