(1) Purchase regulated metals property between the hours of 8 p.m. and 6 a.m.;
(2) Fail to pay any excise tax owed or fail to have a tax registration number;
(3) Purchase regulated metals property at a location other than the place of business set forth in the license;
(4) Purchase regulated metals property from any seller who presents such property for sale at the licensed location of the scrap metals dealer or recycler when such property was not transported in a motor vehicle;
(5) Purchase regulated metals property in return for money from a trailer, a vehicle, or any location other than a fixed location or from any person who is required to prove ownership pursuant to paragraph (4) of this section. However, regulated metals may be purchased from a non-fixed location, or from such person, with any negotiable or nonnegotiable instrument, including a check or draft or any other type of instrument purchased with money and sold for the purpose of making payments or transfers to others.