A franchisee shall not, as to rules, regulations, rates, charges, provision of service or use of a franchisee's facilities and equipment, make, allow or grant any undue preference or advantage on the basis of age, race, creed, color, sex, national origin, disability, religious affiliation or location of residence and shall comply with all applicable federal, state and local laws, regulations and orders. A franchisee shall not deny cable service or the extension of cable service to any group of potential residential cable subscribers because of the income of the residents of the local area in which such group resides. These restrictions do not prohibit a franchisee from offering promotional or incentive discount rates or charges, from offering customized bulk billing arrangements or from offering reasonable discounts to senior citizens or other discounts to economically disadvantaged groups, as long as such discounts or billing arrangements are consistent with federal, state and local law.