Md. Code, Health - General § 22–307

(a) Unless a written protest is filed with the Secretary, a rule or regulation proposed by the Secretary under this subtitle takes effect on the date the Secretary designates but not earlier than 90 days after publication.

(b) Any person who may be affected adversely by a rule or regulation that is proposed by the Secretary under this subtitle may:

(1) File a protest within 30 days after publication of the proposed rule or regulation; and

(2) Request a hearing.