Requirement
(b) Requirement. If the district director determines that any person required to collect, account for, and pay over any tax described in paragraph (a) of this section has, at the time and in the manner prescribed by law or regulations, failed to collect, truthfully account for, or pay over any such tax, or make deposits, payments, or returns of any such tax, such person, if notified to do so by the district director in accordance with section 7512 and paragraph (d) of this section, shall (1) Collect, at the times and in the manner provided by the law and the regulations in respect of the various taxes described in paragraph (a) of this section, all of the taxes described in such paragraph which become collectible by him after receipt of such notice; (2) Deposit the taxes so collected, not later than the end of the second banking day after collection, with a bank, as defined in section 581, in a separate account established in accordance with paragraph (c) of this section; and (3) Keep in such account the taxes so deposited until payment thereof is made to the United States as required by the law and the regulations in respect of such taxes.