Section 20-673. Fraudulent practices prohibited

It shall be unlawful for any
  person  to  sell  or offer for sale gasoline or other petroleum products
  for use in motor vehicles or motor boats in any manner so as to  deceive
  or  tend  to  deceive  the purchaser as to the price, nature, quality or
  identity thereof; provided, however, that this section shall  not  apply
  to  the  prohibition of deceptive practices involving the representation
  of gasoline for motor vehicles as unleaded, which shall be  governed  by
  the  provisions  of section 20-673.1 of this subchapter and any rules or
  regulations promulgated thereunder, and  provided,  further,  that  this
  section  shall  not  apply  to  the  prohibition  of deceptive practices
  involving the certification, display or  representation  of  the  octane
  rating  of  gasoline  for motor vehicles, which shall be governed by the
  provisions of section 20-673.2 of  this  subchapter  and  any  rules  or
  regulations  promulgated thereunder. It shall be unlawful for any person
  to sell or offer for sale from any pump, dispensing devices or container
  any gasoline or other petroleum products other than  gasoline  or  other
  petroleum  products  manufactured  or distributed by the manufacturer or
  distributor marketing such gasoline or other  petroleum  products  under
  the  name,  trade name, brand, symbol or mark affixed to or contained on
  such pump, dispensing device or container,  or  to  substitute,  mix  or
  adulterate gasoline or other petroleum products sold or offered for sale
  under a name, trade name, brand, symbol or mark.