Haw. Rev. Stat. § 576B-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 that 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 that 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.