(a) In general—(1) General rule. Section 1402(e)(5), as amended by the Social Security Amendments of 1965, applies only in the case of a duly ordained, commissioned, or licensed minister of a church, a member of a religious order (other than a member of a religious order who has taken a vow of poverty as a member of such order), or a Christian Science practitioner, who has derived net earnings in any taxable year ending after 1954 from the performance of service in the exercise of his ministry, in the exercise of duties required by his religious order, or in the exercise of his profession as a Christian Science practitioner, respectively, and who has reported such earnings as self-employment income on a return filed on or before the date prescribed for filing such return (including any extension thereof).

(2) Supplemental certificate. Subject to the conditions stated in subparagraph (4) of this paragraph, a certificate on Form 2031 filed on or before April 15, 1966, by a minister, member of a religious order, or a Christian Science practitioner described in subparagraph (1) of this paragraph and which (but for section 1402(e)(5)(A)) is ineffective for the first taxable year ending after 1954 for which a return described in subparagraph (1) of this paragraph was filed by such individual, shall be effective for such first taxable year and for all succeeding taxable years, provided a supplemental certificate is filed by such individual or by a fiduciary acting for him or his estate, or by his survivor (within the meaning of section 205(c)(1)(C) of the Social Security Act), after July 30, 1965 (the date of enactment of the Social Security Amendments of 1965), and on or before April 17, 1967.

(3) Certificate filed by survivor. A survivor (within the meaning of section 205(c)(1)(C) of the Social Security Act) of an individual who:

(i) Died on or before April 15, 1966,

(ii) Was a minister, member of a religious order, or a Christian Science practitioner described in subparagraph (1) of this paragraph,

(iii) Has filed a return as described in subparagraph (1) of this paragraph for a taxable year ending after 1954, and

(iv) Had not filed a valid waiver certificate on Form 2031,

(4) Applicable conditions. A supplemental certificate referred to in subparagraph (2) of this paragraph and a certificate referred to in subparagraph (3) of this paragraph shall be effective only if the following conditions are met:

(i) The tax under section 1401 is paid on or before April 17, 1967, in respect of all self-employment income (whether or not attributable to earnings as a minister, member of a religious order, or Christian Science practitioner) for the first taxable year ending after 1954 for which the individual (by or in respect of whom the supplemental certificate or certificate is filed) has filed a return, as described in paragraph (1) of this paragraph, and for each succeeding taxable year ending before January 1, 1966; and

(ii) In any case where refund has been made of any such tax which (but for section 1402(e)(5)) is an overpayment, the amount refunded (including any interest paid under section 6611) is repaid on or before April 17, 1967. For regulations under section 6611 (relating to interest on overpayments), see § 301.6611-1 of part 301 of this chapter (Regulations on Procedure and Administration).

(b) Underpayment of tax. For purposes of this section, any underpayment of the tax which is attributable to an error made in good faith will not invalidate an election which is otherwise valid.

(c) Nonapplicability of section 6401. Any payment or repayment described in paragraph (a)(4) of this section shall not constitute an overpayment within the meaning of section 6401 which relates to amounts treated as overpayments. For the provisions of section 6401 and the regulations thereunder, see section 6401 and § 301.6401-1 of part 301 of this chapter (Regulations on Procedure and Administration).

(d) Applicability of §§ 1.1402(e) (5)-1 and 1.1402(e)(6)-1. The provisions of section 1402(e) (5) and (6) (in effect prior to July 30, 1965, the date of enactment of the Social Security Amendments of 1965) and §§ 1.1402(e) (5)-1 and 1.1402(e)(6)-1 shall apply with respect to any certificate filed pursuant to such sections if a supplemental certificate is not filed with respect to such certificate as provided in this section.