Utah Constitution Article I Section 18 – Attainder — Ex post facto laws — Impairing contracts
	No bill of attainder, ex post facto law, or law impairing the obligation of contracts shall be passed.
Terms Used In Utah Constitution Article I Section 18 - Attainder -- Ex post facto laws -- Impairing contracts
- Obligation: An order placed, contract awarded, service received, or similar transaction during a given period that will require payments during the same or a future period.