Md. Code, Business Regulation § 10–203

(a) The Comptroller periodically shall collect or cause to be collected and cause to be analyzed samples of all motor fuel that is:

(1) subject to regulation under this title; and

(2) stored and offered for sale in the State.

(b) The Comptroller shall conduct inspections as provided in a memorandum of understanding on behalf of and in coordination with other agencies when collecting motor fuel samples under this section.