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Unfortunately, the division of retirement is intended to be permanent. If the court takes into consideration the length of the marriage, in relation to the military service, the court can choose to limit the percentage. The court can even, in its decree, limit the number of years the division is to take place. However, if the court doesn't choose to do that, then nothing about the number of years of your military service would automatically establish a right to have her stop receiving that percentage.
Likewise, nothing about her now being married to another retired military member establishes any sort of automatic legal right to discontinue the payments, unless the divorce decree specifically states that remarriage has some effect.
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