Approval for charitable deduction requires prescribed conditions, documentation, and timelines; provisional approvals and renewal rules apply. Approval for deduction under section 133(1)(b)(ii) is available to qualifying registered non-profit organisations or specified persons that satisfy prescribed conditions including non-sectarian benefit, charitable purpose, limits on religious expenditure, prohibition on asset transfers for non-charitable purposes, regular accounting, prescribed statement filing and donor certification. Applications follow case-based timelines determining filing deadlines, authority decision periods and approval validity. The Principal Commissioner or Commissioner may seek documents and inquiries to verify genuineness and legal compliance; if satisfied, written approval is issued, otherwise after opportunity to be heard the application may be rejected and approval cancelled, with orders communicated to the applicant and Assessing Officer.