A propane distributor is prohibited from adding any service, distribution, transportation, or similar fees to customer billings for those customers who have entered into a contract for prepurchasing or capitated pricing of propane for the period of the contract provided that:
(1) the customer has met all obligations of that contract; and
(2) the propane distributor can receive product from its contracted supply points and a force majeure has not been declared by the propane distributor's supplier.