A 'change in circumstances' refers to a difference between now, and when the previous judgment was entered. It generally refers to the parents' income, not the children's. In the case of Sandlin and Sandlin, 113 Or App 48, 51, 831 P2d 64 (1992), the court held that a child who otherwise fits the definition of a child attending school under ORS 107.108(4) is entitled to receive child support, even though the child is employed and living in an adult “conjugal relationship,” as long as the child meets the statutory definition and the child’s income is not sufficient to meet his or her needs. In other words, as long as the child's income doesn't cover everything, they can still qualify for support even if they're working or married.
Note that this question was already asked, and answered, in this thread: http://www.avvo.com/legal-answers/can-i-terminate-child-support-for-my-children-who--805026.html?ref=answer_question_serp_title_2
You seem to be asking the same question multiple times in the hopes of getting a different answer. I'm afraid it doesn't work that way.
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