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explicitly state in its order that it is assuming responsibility  |  | for the controlling child-support order. Neither the parties nor  |  | other tribunals should be required to speculate about the effect  |  | of the action taken by the tribunal under this section. |  
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 |   |  | Sec. 42.  19-A MRSA §3254, as enacted by PL 1995, c. 694, Pt. B, §2  |  | and affected by Pt. E, §2, is amended to read: |  
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 |   | | §3254.  Recognition of order modified in another state |  
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 |   |  | A If a child support order issued by a tribunal of this  |  State shall recognize a modification of its earlier child  |  support order is modified by a tribunal of another state that  |  assumed jurisdiction pursuant to a law substantially similar  |  to this chapter and, upon request, except as otherwise  |  provided in this chapter, shall the Uniform Interstate Family  |  | Support Act, a tribunal of the State: |  
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 |   |  | 1.  Enforce amounts accruing before modification.  Enforce  |  May enforce the order that was modified only as to amounts  |  | arrears and interest accruing before the modification; |  
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 |   |  | 2.  Enforce nonmodifiable aspects.  Enforce only  |  nonmodifiable aspects of that order; |  
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 |   |  | 3.  Relief for violations before modification.  Provide  |  other May provide appropriate relief only for violations of  |  that its order that occurred before the effective date of the  |  | modification; and |  
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 |   |  | 4.  Recognize modifying order.  Recognize Shall recognize  |  | the modifying order of the other state, upon registration, for  |  | the purpose of enforcement. |  
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 |   | | (This is Section 612 of the Uniform Act.) |  
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 |   | | A key aspect of UIFSA is the deference to the controlling  |  | child-support order of a sister State demanded from a tribunal  |  | of the forum State. This applies not just to the original  |  | order, but also to a modified child-support order issued by a  |  | second State under the standards established by Section 611,  |  | 613, and 615. For the Act to function properly, the original  |  | issuing State must recognize and accept the modified order as  |  | controlling, and must regard its prior order as prospectively  |  | inoperative. Because the UIFSA system is based on an  |  | interlocking series of  |  | state laws, it is fundamental that a modifying tribunal of one  |  | State lacks the authority to direct the original issuing State  |  | to release its continuing, exclusive jurisdiction. That result  |  | is accomplished  |  
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