The Board of Supervisors shall have the power by ordinance to grant to any person, firm or corporation, any franchise, including any renewal, extension, transfer or amendment thereof, for the use of any public right-of- way or public place within the boundaries of the City for the purpose of providing services to customers. Franchises may be granted only by a competitive process. Each franchise shall contain a specific and definite termination date which shall not be more than 25 years after its first effective date.