Maryland Code, Business Regulation § 17-1811

(a) A promoter may not allow an exhibitor to do business at a show unless, before the show, the exhibitor submits to the promoter:

(b) The exhibitor's affidavit or the photocopy of the trader's license shall be displayed conspicuously during the show.

(c) Within 7 days after a show ends, the promoter shall submit to the Comptroller the exhibitors' affidavits.