N.D. Cent. Code § 14-12.2-46: (612) Recognition of order modified in another state. If a child support order issued by a tribunal of this state is modified by a tribunal of another state which assumed jurisdiction pursuant to the Uniform Interstate Family Support Act, a tribunal of this state:

1.May enforce its order that was modified only as to arrears and interest accruing before the modification;

2.May provide appropriate relief for violations of its order which occurred before the effective date of the modification; and

3.Shall recognize the modifying order of the other state, upon registration, for the purpose of enforcement.