Cal. Wat. Code § 1702 : CALIFORNIA WATER CODE — WATER — APPROPRIATION OF WATER — CHANGE TO AN APPLICATION, PERMIT, OR LICENSE — Establishment that change will not operate to injury of legal user TEXT PDF Before permission to make such a change is granted the petitioner shall establish, to the satisfaction of the board, and it shall find, that the change will not operate to the injury of any legal user of the water involved. Ca. Water Code § 1702 Amended by Stats. 1957, Ch. 1932.