Creation by inter vivos trust instrument. To apply the income, rents, issues and profits arising from _________ to the use, maintenance and support of _________, and upon her [or his] death to pay over the principal and any accumulations of income to such person or persons, and in such shares and lawful estates, as _________ may nominate by her [or his] last will and testament, or other written instrument, and, in default of the same, to pay and transfer the same to _________.