Registration conditions for charitable trusts require prescribed applications, audits, and filing to secure tax-exempt treatment. Voluntary contributions to trusts or institutions established wholly for charitable or religious purposes (other than corpus-directed contributions) are to be treated as income from property held under trust for such purposes for the purposes of section 11, and section 11 and section 13 apply. Section 12A conditions the applicability of sections 11 and 12 on registration in the prescribed form and timeframe (subject to Commissioner's discretion for late admission) and requires an audit and prescribed audit report to be filed with the return where income exceeds the prescribed audit threshold.