1966—Pub. L. 89–719 substituted “Intervention” for “Civil action to clear title to property” in section catchline and substituted provisions, set out in a single paragraph, granting the government authority to intervene in a court proceeding to assert any lien arising under this title on property which is the subject of a civil action or suit to which the government is not a party with the same procedural rules to apply as where the government is initially joined properly as a party and with the proceedings to have no effect on the government’s lien if the application to intervene is denied, for provisions, formerly set out in three subsections, setting out a procedure by which a person having a lien upon or interest in property referred to in section 7403 could file a civil action to clear title to the property and obtain an adjudication of the matter involved in the same manner as in the case of a civil action filed under section 7403.

Amendment by Pub. L. 89–719 applicable after Nov. 2, 1966, regardless of when the title or lien of the United States arose or when the lien or interest of another person was acquired, with certain exceptions, see section 114(a) to (c) of Pub. L. 89–719, set out as a note under section 6323 of this title.

Pub. L. 89–719, title I, § 114(d), Nov. 2, 1966, 80 Stat. 1147, provided that civil actions commenced before Nov. 2, 1966, to clear title to property pursuant to this section as in effect before Nov. 2, 1966, were to be determined in accord with this section as in effect before Nov. 2, 1966.