Md. Code, Election Law § 3-101

(a) There shall be a statewide voter registration list.

(b) The statewide voter registration list shall:

(1) be the official voter registration list for the State;

(2) contain the name and other information for every legally registered voter in the State;

(3) allow each local board to obtain immediate electronic access to the information contained in the list;

(4) be coordinated with other agency databases in the State;

(5) be used to produce precinct registers for use in polling places on election day; and

(6) include voting history information on a current basis for a period covering at least the 5 preceding years.

(c) The State Administrator shall:

(1) define, maintain, and administer the statewide voter registration list;

(2) with the local boards, ensure the currency and accuracy of each individual voter’s registration record;

(3) instruct the local boards on:

(i) processing voter registration applications and name and address changes;

(ii) entering voter registration information into the statewide voter registration list; and

(iii) removing from the statewide voter registration list information about voters who are no longer eligible to be registered voters; and

(4) subject to relevant federal law and to regulations adopted by the State Board, establish and conduct a program to identify voters who have changed their addresses.

(d) Registration shall be conducted continuously under the supervision of the State Administrator and in accordance with the provisions of this title, applicable federal law, and regulations adopted by the State Board.

(e) (1) A State agency shall provide any data to the State Board that the State Administrator determines is necessary to maintain an accurate statewide voter registration list.

(2) Subject to paragraph (3) of this subsection, the State Board may not disclose data provided under paragraph (1) of this subsection except as provided in Title 4 of the General Provisions Article.

(3) (i) The State Board may enter into agreements with other states to exchange any data that the State Administrator determines is relevant to maintaining accurate voter registration lists.

(ii) The State Board may exchange data that is not subject to public disclosure under Title 4 of the General Provisions Article with other persons as the State Administrator determines is necessary for the sole purpose of maintaining accurate voter registration lists.

(iii) A person who receives data that is not subject to public disclosure under Title 4 of the General Provisions Article under this paragraph may not use or redisclose that data except for the purpose of maintaining accurate voter registration lists.

(f) A registered voter:

(1) shall remain registered when the voter moves to another county in the State; and

(2) may not be required to register again unless the voter’s registration is canceled in accordance with Subtitle 5 of this title.