Maryland Code, Election Law § 16-206

(1) place any distinguishing mark on the person's own or another person's ballot for the purpose of identifying the ballot;

(2) misrepresent the person's ability to mark a ballot or operate voting equipment;

(3) interfere or attempt to interfere with a voter while the voter is inside the polling room, marking a ballot, or operating voting equipment;

(4) induce or attempt to induce a voter to mark the voter's ballot in a certain way;

(5) except for servicing by an authorized person, unlock any locked compartment of a voting device unless instructed to do so by the election director;

(6) destroy or deface a ballot;

(7) remove a ballot from a building in which voting occurs, except as otherwise provided in this article;

(8) delay the delivery of a ballot;

(9) possess on or before the day of election an official ballot printed for the election, unless the possession of the ballot is necessary and appropriate for carrying out the election process;

(10) canvass, electioneer, or post any campaign material in the polling place or beyond a line established by signs posted in accordance with subsection (b) of this section;

(11) canvass, electioneer, or post any campaign material in a manner that obstructs access to a ballot drop box; or

(12) place any campaign material or any other unauthorized material on a ballot drop box.

(b)(1) At each polling place, one election judge from each principal political party shall be designated by the local board and, acting jointly, shall post signs delineating a line around the entrance and exit of the building that are closest to that part of the building in which voting occurs.

(3) The signs shall contain the words “No Electioneering Beyond this Point”.