"If an owner of property declares his intention to create a trust of the property in the future, or promises that he will create such a trust, whether by transferring the property to another as trustee or by constituting himself trustee, no trust is presently created. Although a manifestation of intention to create a trust is all that is needed for its creation, it must be a manifestation of intention to create a present trust and not merely to create a trust to arise at some future time. A promise to dispose of the beneficial interest in property at some time in the future is not a present disposition of the beneficial interest. This is true where the intending settlor owns the property at the time he makes the promise; it is true also where he has not yet acquired the property of which he intends to create a trust.[7] ... A promise to create a trust in the future is to be distinguished from the present creation of a trust with a postponement of enjoyment by the beneficiaries. A trust can be created although the settlor is to receive the income for life or for some other period, and the beneficiaries other than the settlor himself are not to receive income or principal until the expiration of the period. Thus where the owner of property transfers it in trust to pay the income to himself for life and on his death to convey the property to or to hold it for designated beneficiaries, a trust is created at the time of the transfer. So also, where the owner of property declares himself trustee in trust to pay himself the income during his life, and on his death the property is to be distributed among designated beneficiaries or held in trust for them, a trust is created at the time of the declaration of trust. In either case it is immaterial that no one but the settlor himself has an interest presently enjoyable and that the interests of the other beneficiaries are postponed in enjoyment. The interests are created at the time of the transfer or declaration of trust.[8] ... Where a person promises, not that he will transfer property in trust, but that he will himself be trustee of property at some time in the future, a trust does not automatically arise when that time arrives. It will arrive at that time, however, if the settlor then manifests an intention to be trustee. His subsequent conduct, taken in connection with his prior promise, may amount to a present declaration of trust."[9]