Circular No. 322-Income Tax Section 13(1)(d ) provides that subject to the provision of section 13(1)(bb ) a trust/institution for charitable or religious purposes will lose the exemption under section 11 for assessment year commencing from the assessment year 1982-83 if any funds of the trust or institution are invested or deposited or continue to remain invested or deposited for any period during any previous year commencing on or after April 1, 1981 in any of the forms or modes other than those specified in section 13(5).