“ The Imperial National Wildlife Refuge in annual quantities reasonably necessary to fulfill the purposes of the Refuge not to exceed (i) 28,000 acre-feet of water diverted from the mainstream or (ii) 23,000 acre-feet of consumptive use of mainstream water, whichever of (i) or (ii) is less, with a priority date of February 14, 1941;
(9) Boulder City, Nevada, as authorized by the Act of September 2, 1958, 72 Stat. 1726, with a priority date of May 15, 1931 ”

“ Provided, further, that no diversion from a stream authorized in Article IV (A) through (D) may be transferred to any of the other streams, nor may any use for irrigation purposes within any area on one of the streams be transferred for use for irrigation purposes to any other area on that stream. ”

“ From diverting or permitting the diversion of water from San Simon Creek, its tributaries and underground water sources for the irrigation of more than a total of 2,900 acres during any one year, and from exceeding a total consumptive use of such water, for whatever purpose, of 72,000 acre-feet during any period of ten consecutive years; and from exceeding a total consumptive use of such water, for whatever purpose, of 8,220 acre-feet during any one year ”