(3)Notwithstanding any contract to the contrary, a policy of life insurance under a non-linked plan which has acquired a surrender value shall not lapse by reason of non-payment of further premiums but shall be kept in force to the extent of paid-up sum insured, calculated by means of a formula as approved by the Authority and contained in the policy and the reversionary bonuses that have already been attached to the policy:Provided that a policy of life insurance under a linked plan shall be kept in force in the manner as may be specified by the regulations.