Section 1 Guaranteed amounts Section 104(c)(1)(B) of title 23, United States Code, is amended— ⋯ (1) in clause (ii) by striking “and” at the end; ⋯ (2) in clause (iii) by striking the period and inserting “; and”; and ⋯ (3) by adding at the end the following: ⋯ “(iv) at least 0.5 percent of the total apportionment.”