§ 1229.
(a)
At any time after confirmation of the plan but before the completion of payments under such plan, the plan may be modified, on request of the debtor, the trustee, or the holder of an allowed unsecured claim, to—
(1)
increase or reduce the amount of payments on claims of a particular class provided for by the plan;
(2)
extend or reduce the time for such payments;
(3)
alter the amount of the distribution to a creditor whose claim is provided for by the plan to the extent necessary to take account of any payment of such claim other than under the plan; or
(4)
provide for the payment of a claim described in section 1232(a) that arose after the date on which the petition was filed.
(Added and amended [Pub. L. 99–554, title II, § 255], title III, § 302(f), Oct. 27, 1986, [100 Stat. 3113], 3124; [Pub. L. 103–65, § 1], Aug. 6, 1993, [107 Stat. 311]; [Pub. L. 105–277, div. C, title I, § 149(a)], Oct. 21, 1998, [112 Stat. 2681–610]; [Pub. L. 106–5, § 1(1)], (2), Mar. 30, 1999, [113 Stat. 9]; [Pub. L. 106–70, § 1], Oct. 9, 1999, [113 Stat. 1031]; [Pub. L. 107–8, § 1], May 11, 2001, [115 Stat. 10]; [Pub. L. 107–17, § 1], June 26, 2001, [115 Stat. 151]; [Pub. L. 107–170, § 1], May 7, 2002, [116 Stat. 133]; [Pub. L. 107–171, title X, § 10814(a)], May 13, 2002, [116 Stat. 532]; [Pub. L. 107–377, § 2(a)], Dec. 19, 2002, [116 Stat. 3115]; [Pub. L. 108–73, § 2(a)], Aug. 15, 2003, [117 Stat. 891]; [Pub. L. 108–369, § 2(a)], Oct. 25, 2004, [118 Stat. 1749]; [Pub. L. 109–8, title X], §§ 1001(a)(1), (c), 1006(b), Apr. 20, 2005, [119 Stat. 185–187]; [Pub. L. 115–72, div. B, § 1005(b)(1)(C)], Oct. 26, 2017, [131 Stat. 1234].)