Maryland Code, Public Safety § 11-117

(a) If a person has been convicted of a violation of § 11-114(a) and (b) of this subtitle, or of a violation of §§ 11-115(a) and 11-114(b) of this subtitle, and the convictions arise out of the same transaction, the conviction under § 11-114(a) or § 11-115(a) of this subtitle merges into the conviction under § 11-114(b) of this subtitle.

(b) If a person has been convicted of two or more violations under this subtitle and has been penalized under § 11-114(g), § 11-115(e), or § 11-116 of this subtitle for one violation, the person is not subject to an additional penalty under § 11-116 of this subtitle.