(a) No park owner shall restrict a tenant in his choice of a seller of fuel, furnishings, accessories or goods or services connected with a mobile home unless such restriction is necessary to protect the health or safety of the park residents. The park owner may determine by rule or regulation the style or quality of exterior equipment to be purchased by the tenant from a vendor of the tenant’s choosing.
     Provided that no park owner shall be required to permit service vehicles in the park in such numbers and with such frequency that a danger is created for pedestrian traffic in the park.
     (b) No park owner shall require as a condition of tenancy or continued tenancy for a tenant to purchase fuel oil or bottled gas from any particular fuel oil or bottled gas dealer or distributor.
     Provided that this Section shall not apply to a park owner who provides a centralized distribution system for fuel oil or bottled gas, or both, for residents therein. No park owner providing a centralized distribution system shall charge residents more than a reasonable retail price.