Maryland Constitution of 1867 Art. 14, § 2

It shall be the duty of the General Assembly to provide by Law for taking, at the general election to be held in the year nineteen hundred and seventy, and every twenty years thereafter, the sense of the People in regard to calling a Convention for altering this Constitution; and if a majority of voters at such election or elections shall vote for a Convention, the General Assembly, at its next session, shall provide by Law for the assembling of such convention, and for the election of Delegates thereto. Each County, and Legislative District of the City of Baltimore, shall have in such Convention a number of Delegates equal to its representation in both Houses at the time at which the Convention is called. But any Constitution, or change, or amendment of the existing Constitution, which may be adopted by such Convention, shall be submitted to the voters of this State, and shall have no effect unless the same shall have been adopted by a majority of the voters voting thereon.