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English definition of “be on the books”

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be on the books

to be employed by a company, or (pay to) belong to a organization, society, sports team, etc.: There are 256 people on the books at the cement works. The nursery has 30 babies on the books and 13 on the waiting list. US to be officially recorded, especially as a law: A ban on texting while driving is on the books in most states.
(Definition of be on the books from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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