(a) No heating fuel dealer shall require that any regular consumer of such dealer accept a minimum delivery of heating fuel of not less than one hundred gallons or seventy-five per cent of primary tank size, whichever is less, as a condition of delivery by such dealer.

(b) Any heating fuel dealer who violates the provisions of this section shall be fined not more than five hundred dollars for the first offense, not more than seven hundred fifty dollars for a second offense occurring not more than three years after a prior offense and not more than one thousand five hundred dollars for a third or subsequent offense occurring not more than three years after a prior offense.