The Chief of Police of the County Police Department is authorized to issue regulations to implement this Division. A pawn dealer or a secondhand dealer may be open to the public between the hours of 7:00 A.M. and 10:00 P.M. and shall not conduct any business with the public at any other time. The use of a drive-up window or other practice, service, or device that enables a patron to conduct business from a motor vehicle without leaving the motor vehicle is prohibited. The Department of Permitting, Inspections, and Enforcement shall not issue a Pawn Dealer license to any person who has been issued a business license by the Department in accordance with Subtitle 5 of the Prince George's County Code, or been issued a license for the retailing of spirituous liquors.