Idaho Const. art. IX, § 5

Neither the legislature nor any county, city, town, township, school district, or other public corporation, shall ever make any appropriation, or pay from any public fund or moneys whatever, anything in aid of any church or sectarian or religious society, or for any sectarian or religious purpose, or to help support or sustain any school, academy, seminary, college, university or other literary or scientific institution, controlled by any church, sectarian or religious denomination whatsoever; nor shall any grant or donation of land, money or other personal property ever be made by the state, or any such public corporation, to any church or for any sectarian or religious purpose; provided, however, that a health facilities authority, as specifically authorized and empowered by law, may finance or refinance any private, not for profit, health facilities owned or operated by any church or sectarian religious society, through loans, leases, or other transactions.