Maryland Code, Criminal Procedure § 11-702.1

(1) is under the custody or supervision of a supervising authority on October 1, 2010;

(2) was subject to registration under this subtitle on September 30, 2010;

(3) is convicted of any felony on or after October 1, 2010, and has a prior conviction for an offense for which registration as a sex offender is required under this subtitle; or

(4) was convicted on or after October 1, 2010, of a violation of § 3-324 of the Criminal Law Article, regardless of whether the victim was a minor.