The payment of a tax required by the provisions of this chapter and its acceptance by the city, and the issuance of a certificate to any person, shall not entitle the holder thereof to carry on any business unless he has complied with all other applicable laws of the city, or to carry on any business in any building or on any premises designated in the certificate in the event that such building or premises are situated in a zone or locality in which the conduct of such business is in violation of this code. The payment of such tax and its acceptance by the city shall in no way relieve the taxpayer from complying with the applicable laws of the city, nor shall it be construed as authorizing the conduct or continuance of any illegal business or of a legal business in an illegal manner, nor as requiring the payment of a license tax for the doing of any act which would constitute an unlawful burden upon or an unlawful interference with interstate or foreign commerce, or which would be in violation of the Constitution of the United States or of the state of California. (Prior code § 23.01.105)