Mont. Const. art. II, § 31 – Ex post facto, obligation of contracts, and irrevocable privileges | Midpage
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Mont. Const. art. II, § 31
Ex post facto, obligation of contracts, and irrevocable privileges
State of Montana
No ex post facto law nor any law impairing the obligation of contracts, or making any irrevocable grant of special privileges, franchises, or immunities, shall be passed by the legislature.