Maryland Code, Election Law § 3-202.1

(a)(1) In this section the following words have the meanings indicated.

(2) “Common access card” means the identification card issued by the U.S. Department of Defense to active-duty military personnel, eligible reserve personnel, Department of Defense civilian employees, and eligible Department of Defense contractor personnel.

(3) “Federal post card application” means the form prescribed under 52 U.S.C. § 20301(b)(2) that may be used by absent uniformed services voters and overseas voters to simultaneously apply to register to vote and apply for an absentee ballot.

(1) submit the federal post card application electronically; and

(2) use a common access card to sign the federal post card application.

(1) may allow the use of a common access card only for the purpose of verifying identity and allowing an individual to fulfill the signature requirement on the federal post card application; and

(2) may not allow an individual to apply to register to vote solely using the common access card.