It shall not be necessary to the validity of any such trust agreement or declaration of trust that it have a trust corpus other than the right of the trustee as beneficiary to receive such proceeds.
(2) Trustee of a trust to be established by will, and upon qualification and issuance of letters of trusteeship such proceeds shall be payable to the trustee to be held and disposed of in accordance with the terms of such will as a testamentary trust. A designation which in substance names as such beneficiary the trustee under the will of the insured, employee or participant, shall be taken to refer to the will of such person actually admitted to probate, whether executed before or after the making of such designation.
(b) If no qualified trustee claims such proceeds from the insurer or other payor within eighteen months after the death of the insured, employee or participant, or if satisfactory evidence is furnished to the insurer or other payor within such period showing that there is or will be no trustee to receive such proceeds, such proceeds shall be paid by the insurer or other payor to the personal representative or assigns of the insured, employee or participant, unless otherwise provided by agreement with the insurer or other payor during the lifetime of the insured, employee or participant.
(c) Except to the extent otherwise provided by the trust agreement, declaration of trust or will, proceeds received by the trustee shall not be subject to the debts of the insured, employee or participant, to any greater extent than if such proceeds were payable to the beneficiaries named in the trust, and for all purposes including transfer or estate tax purposes they shall not be deemed payable to or for the benefit of the estate of the insured, employee or participant.
(d) Proceeds so held in trust may be commingled with any other assets which may properly become part of such trust.
(e) Nothing in this section shall effect the validity of any designation heretofore made of the trustee of any trust established under a trust agreement or declaration of trust or by will.
(f) This section shall be construed as declaring the law as it existed prior to its enactment and not as modifying it.