Maryland Election Law Section 3-302

      (a)      Registration is closed beginning at 9 p.m. on the 21st day preceding an election until the 11th day after that election.

      (b)      A voter registration application received when registration is closed shall be accepted and retained by a local board, but the registration of the applicant does not become effective until registration reopens.

      (c)      A voter registration application that is received by the local board after the close of registration shall be considered timely received for the next election provided:

            (1)      there is sufficient evidence, as determined by the local board pursuant to regulations adopted by the State Board, that the application was mailed on or before registration was closed for that election; or

            (2)      the application was submitted by the voter to the Motor Vehicle Administration, a voter registration agency, another local board, or the State Board prior to the close of registration.