70.243—Exempt amount.
Amount payable to the taxpayer as wages, salary, or other income for each payroll period described in § 70.244 of this part are exempt from levy as follows:
(ii)
The aggregate amount of the deductions for personal exemption allowed the taxpayer under 26 U.S.C. 151 in the taxable year in which such levy occurs, divided by
(b)
If the payroll period is not weekly, the amount exempt from levy shall be an amount which as nearly as possible will result in the same total exemption from levy for such individual over a period of time as such individual would have under paragraph (a) of this section if (during such period of time) the individual were paid or received such wages, salary or other income on a regular weekly basis.