Where the Alien Property Custodian has made demand or requirement for the conveyance, transfer, assignment, delivery, or payment to him of any money or other property of any enemy or ally of enemy (whether or not suit or proceeding for the enforcement thereof has been begun and whether or not any judgment or decree in respect thereof has been made or entered) and where the whole or any part of such money or other property would, if conveyed, transferred, assigned, delivered, or paid to him, be returnable under any provision of this chapter, the Alien Property Custodian may, in his discretion, and on such terms and conditions as he may prescribe, waive such demand or requirement, or accept in full satisfaction of such demand, requirement, judgment, or decree, a less amount than that demanded or required by him.

The Alien Property Custodian shall not make any such waiver or compromise except with the approval of the Attorney General; nor (if any part of such money or property would be returnable only upon the filing of the written consent required by subsection (m) of section 4309 of this title) unless, after compliance with the terms and conditions of such waiver or compromise, the Alien Property Custodian or the Treasurer of the United States will hold (in respect of such enemy or ally of enemy) for investment as provided in section 4322 of this title, an amount equal to 20 per centum of the sum of (1) the value of the money or other property held by the Alien Property Custodian or the Treasurer of the United States at the time of such waiver or compromise, plus (2) the value of the money or other property to which the Alien Property Custodian would be entitled under such demand or requirement if the waiver or compromise had not been made.

Where the Alien Property Custodian has made demand or requirement for the conveyance, transfer, assignment, delivery, or payment to him of any money or other property of any enemy or ally of enemy (whether or not suit or proceeding for the enforcement thereof has been begun and whether or not any judgment or decree in respect thereof has been made or entered) and where the interest or right of such enemy or ally of enemy in such money or property has not, prior to March 10, 1928, vested in enjoyment, the Alien Property Custodian may, in his discretion, and on such terms and conditions as he may prescribe, waive such demand and requirement, without compliance with the requirements of subsection (b) of this section, but only with the approval of the Attorney General.

Nothing in this section shall be construed as requiring the Alien Property Custodian to make any waiver or compromise authorized by this section, and the Alien Property Custodian may proceed in respect of any demand or requirement referred to in subsection (a) or (c) as if this section had not been enacted.

All money or other property received by the Alien Property Custodian as a result of any action or proceeding (whether begun before or after March 10, 1928, and whether or not for the enforcement of a demand or requirement as above specified) shall for the purposes of this chapter be considered as forming a part of the trust in respect of which such action or proceeding was brought, and shall be subject to return in the same manner and upon the same conditions as any other money or property in such trust, except as otherwise provided in subsection (b) of this section.