The provisions of this chapter shall apply only to the Kern Delta Water District, the Cawelo Water District, the Rag Gulch Water District, and the Kern-Tulare Water District as member units of the Kern County Water Agency or to an improvement district formed within the Kern Delta Water District, the Cawelo Water District, the Rag Gulch Water District, or the Kern-Tulare Water District pursuant to the provisions of this division.