S. 263 : Commissioner-Revision of orders prejudicial to revenue – In the course of scrutiny assessment, AO disallowed a part of business advancement expenses after verifying bills and vouchers- Manufacturing – R& D expenditure – Revision for further disallowance, re-determined claim of deduction under S. 80-IC and 80-IE and Weighted deduction-R& D expenditure – Revision is held to be not justified when in the Course of original assessment the AO has examined all the claims. [S. 35, 80IC, 80IE]