California Code
CHAPTER 2 - Premium Coupons
Section 17701.5.

17701.5. It is unlawful for any person to advertise a price that requires the buyer to send in a coupon to the manufacturer for a cash rebate, unless the price actually paid to the person selling the item is clearly and conspicuously advertised along with the final price with the coupon.

(Added by Stats. 1990, Ch. 863, Sec. 1.)