Any person who is required to collect, account for, and pay over any tax imposed by subtitle C or chapter 33, if notice has been delivered to such person in accordance with subsection (a), shall collect the taxes imposed by subtitle C or chapter 33 which become collectible after delivery of such notice, shall (not later than the end of the second banking day after any amount of such taxes is collected) deposit such amount in a separate account in a bank (as defined in section
581), and shall keep the amount of such taxes in such account until payment over to the United States. Any such account shall be designated as a special fund in trust for the United States, payable to the United States by such person as trustee.