Idaho Code § 39-7503
The compact administrator is hereby authorized and empowered to enter into supplementary agreements with appropriate officials of other states pursuant to the compact. In the event that such supplementary agreement shall require or contemplate the use of any institution or facility of this state or require or contemplate the provision of any service of this state, said supplementary agreement shall have no force or effect until approved by the head of the department or agency under whose jurisdiction said institution or facility is operated or whose department or agency will be charged with the rendering of such service. The compact administrator, subject to the approval of the board of examiners, may make or arrange for any payments necessary to discharge any financial obligations imposed upon this state by the compact or by any supplementary agreement entered into thereunder.
Idaho Code § 39-7503