Idaho constitution
Article XIV
Section 1

All able-bodied
male persons, residents of this state, between the ages of eighteen and forty-five
years, shall be enrolled in the militia, and perform such military duty as may be
required by law; but no person having conscientious scruples against bearing arms,
shall be compelled to perform such duty in time of peace. Every person claiming
such exemption from service, shall, in lieu thereof, pay into the school fund of the
county of which he may be a resident, an equivalent in money, the amount and
manner of payment to be fixed by law.