PUBLIC LAWS-CH. 64-FEB. 26 , 1944 the proper administration of the provisions of this compact. Such officials may, by unanimous action, adopt rules and regulations con- sistent with the provisions of this compact. The United States Geological Survey, or whatever Federal agency may succeed to the functions and duties of that agency, insofar as this compact is concerned, shall collaborate with the officials of the States charged with the administration of this compact in the execu- tion of the duty of such officials in the collection, correlation, and publication of information necessary for the proper administration of this compact. ARTICLE IV Each State shall itself or in conjunction with other responsible agencies cause to be established, maintained, and operated such suit- able water gaging stations as it finds necessary to administer this compact. ARTICCE V A. Wyoming and South Dakota agree that the unappropriated waters of the Belle Fourche River as of the date of this compact shall be allocated to each State as follows: 90% to South Dakota 10% to Wyoming; Provided that allocations to Wyoming shall be exclusive of the use of these waters for domestic and stock use, and Wyoming shall be allowed unrestricted use for these purposes, except that no reservoir for such use shall exceed 20 acre-feet in capacity. For storage of its allocated water, Wyoming shall have the privilege of purchasing at cost not to exceed 10% of the total storage capacity of any reservoir or reservoirs constructed in Wyoming for irrigation of lands in South Dakota, or may construct reservoirs itself for the purpose of utilizing such water. Either State may temporarily divert, or store for beneficial use, any unused part of the above percentages allotted to the other, but no continuing right shall be established thereby. B. Rights to the use of the waters of the Belle Fourche River, whether based on direct diversion or storage, are hereby recognized as of the date of this compact to the extent these rights are valid under the law of the State in which the use is made, and shall remain unimpaired hereby. These rights, together with the additional allo- cations made under A of this Article, are agreed to be an equitable apportionment between the States of the waters of the Basin. C. The waters allocated under A of this Article and the rights recognized under B of this Article are hereinafter referred to collec- tively as the apportioned water. For the purposes of the adminis- tration of this compact and determining the apportioned water at any given date within a given calendar year, there shall be taken the sum of: (1) The quantity of water in acre-feet that passed the Wyoming- South Dakota State line during the period from January 1 of that year to that given date. (2) The quantity of water in acre-feet in storage on that date in all reservoirs builtin Wyoming on the Belle Fourche River subsequent to the date of this compact. ANTICLE VI Any person, entity, or State shall have the right to acquire necessary property rights in another State by purchase or through the exercise of the power of eminent domain for the construction, operation and [58 STAT.
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