Before conducting business in a county, a transient vendor shall obtain a transient vendor license required under this part. This part does not exempt a transient vendor from obtaining any other license or permit from: the United States; the State; the county; any municipality in Frederick County; or the City of Hagerstown. This part does not exempt a transient vendor from liability, tax liability, or any other regulations that may be applicable in: the United States; the State; the county; any municipality in Frederick County; or the City of Hagerstown. Unless otherwise allowed by law, a transient vendor may not sell goods on Sunday. A person who engages in business as a transient vendor in violation of this part is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 1 year or a fine not exceeding $2,500 or both.