Section 1. For the purpose of this chapter, the following words shall, unless the context otherwise requires, have the following meanings:?
''Supplier'', any person engaged in the sale, consignment or distribution of petroleum products to retail outlets.
''Dealer'', any person who is not a petroleum supplier, engaged in the retail sale of gasoline to the motoring public in the commonwealth under written agreements entered into with a petroleum supplier.
''Marketing agreement'', means any agreement either written or oral between a supplier and a retail dealer under which (1) the retail dealer promises to sell or distribute the produce or products of the supplier; (2) the retail dealer is granted the right to use a trademark, trade name, service mark or other identifying symbol or name owned by a manufacturer; or (3) the retail dealer is granted the right to occupy premises owned, leased or controlled by a supplier.