It shall be the policy of the City Commission to liberally amend any franchise of its own volition or upon application of a franchisee, after public hearing, when necessary to require or enable a franchisee to take advantage of any developments in the field of transmission of television and radio signals which would afford the franchisee an opportunity to more effectively, efficiently, or economically serve its customers so that at all times the cable communications system shall be no less advanced than any other system of comparable size, excepting only systems which are experimental, pilot, or demonstration.
('81 Code, § 450.1, § 28)