Historical and Revision Notes
Revised Section	Source (U.S. Code)	Source (Statutes at Large)
20135(a)	45:431(i)(1).	Oct. 16, 1970, Pub. L. 91–458, 84 Stat. 971, § 202(i); added June 22, 1988, Pub. L. 100–342, §§ 4(a), 7(b), 102 Stat. 625, 628; Sept. 3, 1992, Pub. L. 102–365, § 2(1), 106 Stat. 972.
20135(b)	45:431(i)(2).
20135(c)(1)	45:431(i)(4).
20135(c)(2)	45:431(i)(6).
20135(d)	45:431(i)(5).
20135(e)	45:431(i)(3).

In subsection (a), the words “within 12 months after June 22, 1988” are omitted as executed. The words “including any locomotive engineer” are omitted as surplus. The words “after one year after” are substituted for “after the expiration of 12 months following” to eliminate unnecessary words.

In subsection (b)(5), the word “requirements” is substituted for “terms” for consistency in this section.

In subsection (c)(1), the words “In establishing the program under this subsection” are omitted as surplus.