Exhibition of certificate of payment at place of business.
Section 207
SEC. 207. Exhibition of certificate of payment at place of business. — The certificate or receipt showing payment of tax issued to a person engaged in a business or occupation subject to a privilege tax shall be kept conspicuously exhibited in plain view in or at the place where the business is conducted or occupation plied; and, in case of a peddler or other person not having a fixed place of business, shall be kept in the possession of the holder thereof, subject to production upon the demand of any internal-revenue officer.