61-8-305. Applicability of conservation speed limit. (1) The provisions of 61-8-304 do not apply to those public streets and highways for which a speed limit lower than that required by federal law was applicable on March 2, 1974, under any other state, county, municipal, or other local law, ordinance, regulation, or order.
     (2) The fuel conservation speed limits imposed by 61-8-304 remain in effect only as long as the establishment of those speed limits by the state is required by federal law as a condition to the state's continuing eligibility to receive funds authorized by the Federal-Aid Highways Amendments of 1974 and all acts amendatory thereto or any other federal statute.
     (3) If the speed limit of 55 miles an hour for vehicles traveling on federal-aid interstate highways within an urbanized area of 50,000 population or more is no longer required by federal law as a condition to the state's continuing eligibility for federal highway funding, the speed limit within an urbanized area increases to 65 miles an hour.
     (4) If there is no speed limit required by federal law as a condition to the state's continuing eligibility for federal highway funding, then the speed limit on Montana highways is subject to the basic rule and other speed restrictions in 61-8-303.

     History: En. 32-2144.2, 32-2144.3, 32-2144.4 by Secs. 2, 3, 4, Ch. 60, L. 1974; R.C.M. 1947, 32-2144.2, 32-2144.3, 32-2144.4; amd. Sec. 2, Ch. 681, L. 1983; amd. Sec. 1, Ch. 499, L. 1989.