Maryland Constitution of 1867 Art. 11-A, § 7

The word “Petition” as used in this Article means one or more sheets written or printed, or partly written and partly printed. There shall be attached to each paper of signatures filed with a petition an affidavit of the person procuring those signatures that the signatures were affixed in his presence and that, based upon the person's best knowledge and belief, every signature on the paper is genuine and bona fide and that the signers are registered voters at the address set opposite or below their names. The General Assembly shall prescribe by law the form of the petition, the manner for verifying its authenticity, and other administrative procedures which facilitate the petition process and which are not in conflict with this Article. The false signing of any name, or the signing of any fictitious name to said petition shall be forgery, and the making of any false affidavit in connection with said petition shall be perjury.