Maryland Election Law Section 13-209

      (a)      Two or more candidates who have established separate campaign finance entities may form a slate.

      (b)      After establishing a campaign finance entity in accordance with § 13-202(b) of this subtitle, a candidate may join a slate.

      (c)      (1)      To join a slate, a candidate shall file a written notice with the board where the candidate filed a certificate of candidacy.

            (2)      The notice shall specify:

                  (i)      the name of the slate that the candidate has joined; and

                  (ii)      the date on which the candidate joined the slate.