Maryland Code, Election Law § 5-703.1

(c)(1) This subsection does not apply to a candidate nominated by a new political party under § 4-102(f) of this article.

(2) A candidate for public office who seeks political party nomination under this section shall file a declaration of intent to seek political party nomination.

(3) The declaration of intent shall be filed with the board at which the candidate files a certificate of candidacy under Subtitle 3 of this title.

(4) The declaration of intent shall be filed as follows:

(5) A candidate who seeks nomination by political party may not be charged a fee for filing the declaration of intent.

(d)(1) A candidate for public office who seeks nomination by political party shall file a certificate of candidacy not later than 5 p.m. on the first Monday in August in the year of the general election for the office.

(2) Except for the time of filing, the certificate of candidacy for a candidate who seeks nomination by political party shall comply with the requirements for a certificate of candidacy under Subtitle 3 of this title.

(e)(1) A candidate for nomination by political party may not have the candidate's name placed on the general election ballot unless the candidate files with the appropriate board, on a form the State Board prescribes, a certificate of nomination signed by the officers of the political party.

(2) In a special election to fill a vacancy in the office of Representative in Congress, a certificate of nomination shall be filed with the State Board by 5 p.m. on the day of the special primary election.