[LIS-Forum] weeding out of books

Sir,   May I know that: if there is any governemnt/UGC norms or rules for weeding out of the obsolete books?. how much books we can weed out and dispose off at a time and after what duration we should weed out the books. whether we can weed out books regularly/every year or after a gap of few years. Any government/ugc/university norms in this regard may kindly be cleared.   Thanking you,   regrads, Balesh Kumar Librarian S. D. College (Lahore) Ambala Cantt.-133 001 (Haryana) (M) 09416073008 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.