Any trust previously or subsequently established by the depositing with or transferring to a trustee of any life, accident or health insurance policies with proceeds assigned or otherwise made payable to the trustee, irrespective of whether the designation of policy beneficiary is revocable or irrevocable, or whether the insured reserves loan privileges, the right to receive the cash surrender values under any of the policies, the right to receive dividends, or any other or all benefits under any of the policies and/or avails the insured thereof, and irrespective also of whether or not the creator of the trust reserves to the creator the right to modify the trust or withdraw part or all of the property from the trust, shall be valid and legally effective as to all the property and the disposition of the property, except any that may have been affected by the exercise of any of the reserved rights, and it shall not be necessary to the validity of the trust that the instrument creating the trust be executed according to the formalities prescribed for the execution of wills.