Since its enactment, the Chapter has undergone substantial changes. Initially, for e.g., the lack of specific definitions of "serious harm" § 1589 (c)(1) and (2) halted effective prosecution and actions for restitution and damages, and entertained stricter constructions then to allow for an effective legislative tool to prevent trafficking.
According to the Human Trafficking Legal Center's 2020 report (see, p. 10), over the span of 17 yeas, merely 458 cases were filed; the first five years of § 1595 from 2003, only saw 34 cases across the country.
The history of amendments, according to Cornell Law School's U.S. Code site is as follows:
"Added Pub. L. 108–193, § 4(a)(4)(A), Dec. 19, 2003, 117 Stat. 2878; amended Pub. L. 110–457, title II, § 221(2), Dec. 23, 2008, 122 Stat. 5067; Pub. L. 114–22, title I, § 120, May 29, 2015, 129 Stat. 247; Pub. L. 115–164, § 6, Apr. 11, 2018, 132 Stat. 1255.)
However, no links allow for the viewing of previous states of the statute to view its legislative history, and I am wondering what the actual content of these amendments were to reconstruct the legislative developments on the fight against the "contemporary manifestation of slavery" (Ditullio v. Boehm, 662 F.3d 1091, 1094 (9th Cir. 2011)).
 
    