Md. Code, Local Government § 9–313

(a) (1) The voters of a code county may submit to referendum, by

petition, a public local law or a part of a public local law enacted under this subtitle.

(2) The referendum shall be:

(i) at the next regular congressional election unless the county

commissioners, by resolution, schedule a special election;

(ii) in accordance with the requirements of Title 7 of the

Election Law Article as to time, notice, and form; and

(iii) for adoption or rejection by a majority of those voting on

the question.

(b) (1) Subject to paragraph (2) of this subsection, a referendum petition

shall:

(i) be filed with the county board of elections within 40 days

after a public local law is enacted; and

(ii) contain the signatures of at least 10% of the voters of the

code county.

(2) If more than one–half but less than the full number of signatures

required to complete a referendum petition against a public local law are filed within

40 days after the public local law is enacted, the time for the public local law to take

effect and the time for filing the remainder of signatures to complete the referendum

petition is extended for an additional 40 days.

(c) (1) Subject to paragraph (2) of this subsection, a referendum petition

may consist of several papers.

(2) Each paper shall:

(i) contain the full text of the public local law or part of the

public local law petitioned to referendum; and

(ii) have attached to it an affidavit of the individual who

procured the signatures on the petition that certifies that to the best of the

individual’s personal knowledge, information, and belief:

1. each signature on the petition is genuine; and

2. the signers are voters in the code county.

(d) The county board of elections shall verify the voter registration of each

signer.

(e) (1) Except as provided in paragraph (2) of this subsection, if a legally

sufficient referendum petition on a public local law is filed with the county board of

elections, the public local law does not take effect until 30 days after its approval by

a majority of the voters voting on the question.

(2) An emergency law petitioned to referendum:

(i) remains in effect from its effective date notwithstanding

the filing of the referendum petition; but

(ii) is repealed 30 days after its rejection by a majority of the

voters voting on the question.