The franchisee shall not, as to rates, charges, services or facilities,
make or grant any undue privilege or advantage to any party, nor subject
any party to undue prejudice or disadvantage, provided that the franchisee
may establish reasonable classifications of customers. Nothing in
this chapter prohibits the reduction or waiver of charges in connection
with temporary promotional campaigns or providing a senior citizen
discount, provided the same waivers are provided to all similarly
situated customers.