Section 1215(c)(1) of Pub. L. 109–280, which directed the addition of section 6720B at the end of part I of subchapter B of chapter 68, without specifying the act to be amended, was executed by adding section 6720B at the end of part I of subchapter B of chapter 68 of this title, which consists of the Internal Revenue Code of 1986, to reflect the probable intent of Congress.

Pub. L. 109–280, title XII, § 1215(d)(3), Aug. 17, 2006, 120 Stat. 1079, provided that: “The amendments made by subsection (c) [enacting this section] shall apply to identifications made after the date of the enactment of this Act [Aug. 17, 2006].”