A Tribe or Tribal organization must include in its Tribal IV-D plan copies of Tribal laws providing for income withholding in accordance with this section.

(a) In the case of each noncustodial parent against whom a support order is or has been issued or modified under the Tribal IV-D plan, or is being enforced under such plan, so much of his or her income, as defined in §309.05, must be withheld as is necessary to comply with the order.

(b) In addition to the amount to be withheld to pay the current month's obligation, the amount withheld must include an amount to be applied toward liquidation of any overdue support.

(c) The total amount to be withheld under paragraphs (a) and (b) of this section may not exceed the maximum amount permitted under section 303(b) of the Consumer Credit Protection Act (15 U.S.C. 1673(b)), but may be set at a lower amount.

(d) Income withholding must be carried out in compliance with the procedural due process requirements established by the Tribe or Tribal organization.

(e) The Tribal IV-D agency will promptly refund amounts which have been improperly withheld.

(f) The Tribal IV-D agency will promptly terminate income withholding in cases where there is no longer a current order for support and all arrearages have been satisfied.

(g) If the employer fails to withhold income in accordance with the provision of the income withholding order, the employer will be liable for the accumulated amount the employer should have withheld from the noncustodial parent's income.

(h) Income shall not be subject to withholding in any case where:

(1) Either the custodial or noncustodial parent demonstrates, and the tribunal enters a finding, that there is good cause not to require income withholding; or

(2) A signed written agreement is reached between the noncustodial and custodial parent, which provides for an alternative arrangement, and is reviewed and entered into the record by the tribunal.

(i) Where immediate income withholding is not in place, the income of the noncustodial parent shall become subject to withholding, at the earliest, on the date on which the payments which the noncustodial parent has failed to make under a Tribal support order are at least equal to the support payable for one month.

(j) The only basis for contesting a withholding is a mistake of fact, which for purposes of this paragraph, means an error in the amount of current or overdue support or in the identity of the alleged noncustodial parent.

(k) Tribal law must provide that the employer is subject to a fine to be determined under Tribal law for discharging a noncustodial parent from employment, refusing to employ, or taking disciplinary action against any noncustodial parent because of the withholding.

(l) To initiate income withholding, the Tribal IV-D agency must send the noncustodial parent's employer a notice using the standard Federal income withholding form.

(m) The Tribal IV-D agency must allocate withheld amounts across multiple withholding orders to ensure that in no case shall allocation result in a withholding for one of the support obligations not being implemented.

(n) The Tribal IV-D agency is responsible for receiving and processing income withholding orders from States, Tribes, and other entities, and ensuring orders are properly and promptly served on employers within the Tribe's jurisdiction.