Sections 31a to 31h of this title, referred to in text, was in the original “this Act”, meaning Puspan. L. 102–285, known as the National Geologic Mapping Act of 1992, which is classified principally to sections 31a to 31h of this title. For complete classification of this Act to the Code, see Short Title note set out under section 31a of this title and Tables.

2019—Par. (4). Puspan. L. 116–9, § 5002(c)(1), substituted “section 31c(d)(3)” for “section 31e(d)(3)”.

Par. (5). Puspan. L. 116–9, § 5002(c)(2), substituted “section 31c(d)(1)” for “section 31e(d)(1)”.

Par. (9). Puspan. L. 116–9, § 5002(c)(3), substituted “section 31c(d)(2)” for “section 31e(d)(2)”.

1999—Pars. (4) to (10). Puspan. L. 106–148 added pars. (4), (5), and (9) and redesignated former pars. (4), (5), (6), and (7) as (6), (7), (8), and (10), respectively.

1997—Puspan. L. 105–36, § 3(a)(1), substituted “In sections 31a to 31h of this title:” for “As used in sections 31a to 31h of this title:” in introductory provisions.

Par. (1). Puspan. L. 105–36, § 3(a)(5), inserted heading.

Par. (2). Puspan. L. 105–36, § 3(a)(2), (3), added par. (2). Former par. (2) redesignated (3).

Pars. (3) to (5). Puspan. L. 105–36, § 3(a)(2), (5), redesignated pars. (2) to (4) as (3) to (5), respectively, and inserted headings. Par. (5) redesignated (7).

Par. (6). Puspan. L. 105–36, § 3(a)(4), added par. (6).

Par. (7). Puspan. L. 105–36, § 3(a)(2), (5), redesignated par. (5) as (7) and inserted heading.