Notwithstanding any other statutory provision to the contrary, the district may pledge all or any part of income received under Section 29123 to the payment of any revenue bonds to be issued pursuant to Article 6 (commencing with Section 29240) of this chapter or the payment of any equipment trust certificates to be issued pursuant to Article 7 (commencing with Section 29250) of this chapter. Income so pledged may be declared in such pledge to be revenues of the enterprise for all purposes of the Revenue Bond Law of 1941, notwithstanding anything to the contrary therein contained.