§ 4206.4 Amount of credit in plans using the presumptive method.

(a) General. In a plan that uses the presumptive allocation method described in section 4211(b) of ERISA, the credit shall equal the sum of the unamortized old liabilities determined under paragraph (b) of this section, multiplied by the fractions described or determined under paragraph (c) of this section. When an employer's prior partial withdrawal liability has been reduced or waived, this credit shall be adjusted in accordance with § 4206.8.