; (2) by inserting or powered primarily by means of electric battery power after the first time natural gas appears; (3) by striking any vehicle weight limit and inserting the weight limit on the power unit by up to 2,000 pounds ; and (4) by striking all that follows after under this section and inserting a period after section . 423. Section 31112(c) of title 49, United States Code, is amended— (1) in the subsection heading by striking and Kansas and inserting Kansas, and Oregon ; (2) in paragraph (4) by striking and at the end; (3) in paragraph (5) by striking the period at the end and inserting ; and ; and (4) by adding at the end the following: (6) Oregon may allow the operation of a truck tractor and 2 property-carrying units not in actual lawful operation on a regular or periodic basis on June 1, 1991, if— (A) the length of the property-carrying units does not exceed 82 feet 8 inches; (B) the combination is used only to transport sugar beets; and (C) the operation occurs on United States Route 20, United States Route 26, United States Route 30, or Oregon Route 201 in the vicinity, or between any, of— (i) Vale, Oregon; (ii) Ontario, Oregon