The lapse of a general power of appointment created after October 21, 1942, during the life of the individual possessing the power shall be considered a release of such power. The preceding sentence shall apply with respect to the lapse of powers during any calendar year only to the extent that the property, which could have been appointed by exercise of such lapsed powers, exceeded in value, at the time of such lapse, the greater of the following amounts: (a) Five thousand dollars or (b) five per cent of the aggregate value, at the time of such lapse, of the assets out of which, or the proceeds of which, the exercise of the lapsed powers could have been satisfied.