Maryland Election Law Section 5-205
§ 5-205.
  (a)   In accordance with Article II of the Maryland Constitution, when a candidate for nomination for Governor files a certificate of candidacy for that office, the candidate shall designate a candidate for Lieutenant Governor.
  (b)   The candidates for nomination for Governor and Lieutenant Governor each shall file for nomination and be considered a unit for nomination to the offices of Governor and Lieutenant Governor.
  (c)   (1)   The names of the candidates of a unit for Governor and Lieutenant Governor shall be listed jointly on the ballot.
    (2)   A vote cast for a candidate for Governor also shall be a vote cast for the candidate for Lieutenant Governor.