Every licensee under this chapter shall do the following:
   A.   Comply With Laws: Ascertain and at all times comply with all laws and regulations applicable to a licensed business;
   B.   Avoidance Of Illegal Practices: Avoid any illegal, dangerous or harmful practices or conditions which are detrimental to the public property, health, welfare, peace or safety;
   C.   Refrain From Business: Refrain from engaging in business on the licensed premises during the period his license is revoked or suspended;
   D.   Posting: The licensee shall post his current business license in a conspicuous place on the licensed premises at all times. (Ord. 198, Series of 1991)