Md. Code, Education § 9.5–408

(a) (1) A license authorizes the licensee to operate a child care center while the license is effective.

(2) A license authorizes the licensee to operate a child care center that offers or provides child care regardless of the time of day.

(b) Unless the Department first approves the change, a licensee may not make any substantial addition to or other change in a building or plant of the child care center or a change in its facilities that could affect materially any condition under which the license was issued.