A prior section 4281, act Aug. 16, 1954, ch. 736, 68A Stat. 508, related to tax on transportation of oil by pipeline, prior to repeal by Pub. L. 85–475, § 4(a), June 30, 1958, 72 Stat. 260. For effective date of repeal, see section 4(c) of Pub. L. 85–475, set out as an Effective Date of 1958 Amendment note under section 6415 of this title.

2005—Pub. L. 109–59 inserted at end “For purposes of this section, an aircraft shall not be considered as operated on an established line at any time during which such aircraft is being operated on a flight the sole purpose of which is sightseeing.”

1982—Pub. L. 97–248 struck out “(as defined in section 4492 (b))” after “certificated takeoff weight”, and inserted provision defining “maximum certificated takeoff weight”.

Pub. L. 109–59, title XI, § 11124(b), Aug. 10, 2005, 119 Stat. 1953, provided that: “The amendment made by this section [amending this section] shall apply with respect to transportation beginning after September 30, 2005, but shall not apply to any amount paid before such date for such transportation.”

Amendment by Pub. L. 97–248 applicable with respect to transportation beginning after Aug. 31, 1982, but inapplicable to amounts paid on or before such date, see section 280(d) of Pub. L. 97–248, set out as a note under section 4261 of this title.

Section effective on July 1, 1970, see section 211(a) of Pub. L. 91–258, set out as an Effective Date of 1970 Amendment note under section 4041 of this title.