Idaho Code § 63-2455
(1) It is unlawful for any person to operate a motor vehicle or consume any motor fuel in the propulsion of a motor vehicle over twenty-six thousand (26,000) pounds maximum gross weight on the highways of this state, except as provided in section 63-2438 , Idaho Code, unless:
(2) It is unlawful to display any international fuels tax agreement (IFTA) cab card or decal or temporary permit that:
[63-2455, added 2015, ch. 38, sec. 14, p. 86.]