Attention people working in gas station.  Do not sell stuffs that can put u in these problems. There are some oweners who ask the clerk to sell these products under the counter but still u should go aginst him and tell them that u will be in touble for selling that not him. if he puts u in pressure then just tell the customers that its out right now or  come back later or u dont have it anymore. just stay in safe side. dont put yourself in trouble inorder to give your boss some profit.