The power and obligation of the County to pay all bonds and notes hereafter issued by it pursuant to this chapter shall be unlimited. The full faith and credit of the County is hereby pledged for the payment of the principal of and the interest on all bonds and notes of the County hereafter issued pursuant to this chapter whether or not such pledge be stated in the bonds or notes, or in the bond resolution, or note resolution, authorizing their issuance. Bonds or notes issued for the purpose of acquiring, constructing, extending or improving projects authorized by this chapter may be additionally secured by a pledge of the revenue derived from the operation of said enterprise, as may be provided in the bond resolution or note resolution, authorizing the bonds or notes.