29 USC 1055 - Requirement of joint and survivor annuity and preretirement survivor annuity

(a) Required contents for applicable plans 
Each pension plan to which this section applies shall provide that
(1) in the case of a vested participant who does not die before the annuity starting date, the accrued benefit payable to such participant shall be provided in the form of a qualified joint and survivor annuity, and
(2) in the case of a vested participant who dies before the annuity starting date and who has a surviving spouse, a qualified preretirement survivor annuity shall be provided to the surviving spouse of such participant.
(b) Applicable plans 

(1) This section shall apply to
(A) any defined benefit plan,
(B) any individual account plan which is subject to the funding standards of section 1082 of this title, and
(C) any participant under any other individual account plan unless
(i) such plan provides that the participants nonforfeitable accrued benefit (reduced by any security interest held by the plan by reason of a loan outstanding to such participant) is payable in full, on the death of the participant, to the participants surviving spouse (or, if there is no surviving spouse or the surviving spouse consents in the manner required under subsection (c)(2) of this section, to a designated beneficiary),
(ii) such participant does not elect the payment of benefits in the form of a life annuity, and
(iii) with respect to such participant, such plan is not a direct or indirect transferee (in a transfer after December 31, 1984) of a plan which is described in subparagraph (A) or (B) or to which this clause applied with respect to the participant.

Clause (iii) of subparagraph (C) shall apply only with respect to the transferred assets (and income therefrom) if the plan separately accounts for such assets and any income therefrom.

(2) 
(A) In the case of
(i) a tax credit employee stock ownership plan (as defined in section 409 (a) of title 26), or
(ii) an employee stock ownership plan (as defined in section 4975 (e)(7) of title 26),

subsection (a) of this section shall not apply to that portion of the employees accrued benefit to which the requirements of section 409 (h) of title 26 apply.

(B) Subparagraph (A) shall not apply with respect to any participant unless the requirements of clause[1] (i), (ii), and (iii) of paragraph (1)(C) are met with respect to such participant.
(4) [2] This section shall not apply to a plan which the Secretary of the Treasury or his delegate has determined is a plan described in section 404 (c) of title 26 (or a continuation thereof) in which participation is substantially limited to individuals who, before January 1, 1976, ceased employment covered by the plan.
(4) [2] A plan shall not be treated as failing to meet the requirements of paragraph (1)(C) or (2) merely because the plan provides that benefits will not be payable to the surviving spouse of the participant unless the participant and such spouse had been married throughout the 1-year period ending on the earlier of the participants annuity starting date or the date of the participants death.
(c) Plans meeting requirements of section 

(1) A plan meets the requirements of this section only if
(A) under the plan, each participant
(i) may elect at any time during the applicable election period to waive the qualified joint and survivor annuity form of benefit or the qualified preretirement survivor annuity form of benefit (or both),
(ii) if the participant elects a waiver under clause (i), may elect the qualified optional survivor annuity at any time during the applicable election period, and
(iii) may revoke any such election at any time during the applicable election period, and
(B) the plan meets the requirements of paragraphs (2), (3), and (4).
(2) Each plan shall provide that an election under paragraph (1)(A)(i) shall not take effect unless
(A) 
(i) the spouse of the participant consents in writing to such election,
(ii)  such election designates a beneficiary (or a form of benefits) which may not be changed without spousal consent (or the consent of the spouse expressly permits designations by the participant without any requirement of further consent by the spouse), and
(iii)  the spouses consent acknowledges the effect of such election and is witnessed by a plan representative or a notary public, or
(B) it is established to the satisfaction of a plan representative that the consent required under subparagraph (A) may not be obtained because there is no spouse, because the spouse cannot be located, or because of such other circumstances as the Secretary of the Treasury may by regulations prescribe.

Any consent by a spouse (or establishment that the consent of a spouse may not be obtained) under the preceding sentence shall be effective only with respect to such spouse.

(3) 
(A) Each plan shall provide to each participant, within a reasonable period of time before the annuity starting date (and consistent with such regulations as the Secretary of the Treasury may prescribe) a written explanation of
(i) the terms and conditions of the qualified joint and survivor annuity and of the qualified optional survivor annuity,
(ii) the participants right to make, and the effect of, an election under paragraph (1) to waive the joint and survivor annuity form of benefit,
(iii) the rights of the participants spouse under paragraph (2), and
(iv) the right to make, and the effect of, a revocation of an election under paragraph (1).
(B) 
(i) Each plan shall provide to each participant, within the applicable period with respect to such participant (and consistent with such regulations as the Secretary may prescribe), a written explanation with respect to the qualified preretirement survivor annuity comparable to that required under subparagraph (A).
(ii) For purposes of clause (i), the term applicable period means, with respect to a participant, whichever of the following periods ends last:
(I) The period beginning with the first day of the plan year in which the participant attains age 32 and ending with the close of the plan year preceding the plan year in which the participant attains age 35.
(II) A reasonable period after the individual becomes a participant.
(III) A reasonable period ending after paragraph (5) ceases to apply to the participant.
(IV) A reasonable period ending after this section applies to the participant.

In the case of a participant who separates from service before attaining age 35, the applicable period shall be a reasonable period after separation.

(4) Each plan shall provide that, if this section applies to a participant when part or all of the participants accrued benefit is to be used as security for a loan, no portion of the participants accrued benefit may be used as security for such loan unless
(A) the spouse of the participant (if any) consents in writing to such use during the 90-day period ending on the date on which the loan is to be so secured, and
(B) requirements comparable to the requirements of paragraph (2) are met with respect to such consent.
(5) 
(A) The requirements of this subsection shall not apply with respect to the qualified joint and survivor annuity form of benefit or the qualified preretirement survivor annuity form of benefit, as the case may be, if such benefit may not be waived (or another beneficiary selected) and if the plan fully subsidizes the costs of such benefit.
(B) For purposes of subparagraph (A), a plan fully subsidizes the costs of a benefit if under the plan the failure to waive such benefit by a participant would not result in a decrease in any plan benefits with respect to such participant and would not result in increased contributions from such participant.
(6) If a plan fiduciary acts in accordance with part 4 of this subtitle in
(A) relying on a consent or revocation referred to in paragraph (1)(A), or
(B) making a determination under paragraph (2),

then such consent, revocation, or determination shall be treated as valid for purposes of discharging the plan from liability to the extent of payments made pursuant to such Act.

(7) For purposes of this subsection, the term applicable election period means
(A) in the case of an election to waive the qualified joint and survivor annuity form of benefit, the 180-day period ending on the annuity starting date, or
(B) in the case of an election to waive the qualified preretirement survivor annuity, the period which begins on the first day of the plan year in which the participant attains age 35 and ends on the date of the participants death.

In the case of a participant who is separated from service, the applicable election period under subparagraph (B) with respect to benefits accrued before the date of such separation from service shall not begin later than such date.

(8) Notwithstanding any other provision of this subsection
(A) 
(i) A plan may provide the written explanation described in paragraph (3)(A) after the annuity starting date. In any case to which this subparagraph applies, the applicable election period under paragraph (7) shall not end before the 30th day after the date on which such explanation is provided.
(ii) The Secretary of the Treasury may by regulations limit the application of clause (i), except that such regulations may not limit the period of time by which the annuity starting date precedes the provision of the written explanation other than by providing that the annuity starting date may not be earlier than termination of employment.
(B) A plan may permit a participant to elect (with any applicable spousal consent) to waive any requirement that the written explanation be provided at least 30 days before the annuity starting date (or to waive the 30-day requirement under subparagraph (A)) if the distribution commences more than 7 days after such explanation is provided.
(d) (1) “Qualified joint and survivor annuity” defined 

(1) (1) “Qualified joint and survivor annuity” defined 
For purposes of this section, the term qualified joint and survivor annuity means an annuity
(A) for the life of the participant with a survivor annuity for the life of the spouse which is not less than 50 percent of (and is not greater than 100 percent of) the amount of the annuity which is payable during the joint lives of the participant and the spouse, and
(B) which is the actuarial equivalent of a single annuity for the life of the participant.

Such term also includes any annuity in a form having the effect of an annuity described in the preceding sentence.

(2) 
(A) For purposes of this section, the term qualified optional survivor annuity means an annuity
(i) for the life of the participant with a survivor annuity for the life of the spouse which is equal to the applicable percentage of the amount of the annuity which is payable during the joint lives of the participant and the spouse, and
(ii) which is the actuarial equivalent of a single annuity for the life of the participant.

Such term also includes any annuity in a form having the effect of an annuity described in the preceding sentence.

(B) 
(i) For purposes of subparagraph (A), if the survivor annuity percentage
(I) is less than 75 percent, the applicable percentage is 75 percent, and
(II) is greater than or equal to 75 percent, the applicable percentage is 50 percent.
(ii) For purposes of clause (i), the term survivor annuity percentage means the percentage which the survivor annuity under the plans qualified joint and survivor annuity bears to the annuity payable during the joint lives of the participant and the spouse.
(e) “Qualified preretirement survivor annuity” defined 
For purposes of this section
(1) Except as provided in paragraph (2), the term qualified preretirement survivor annuity means a survivor annuity for the life of the surviving spouse of the participant if
(A) the payments to the surviving spouse under such annuity are not less than the amounts which would be payable as a survivor annuity under the qualified joint and survivor annuity under the plan (or the actuarial equivalent thereof) if
(i) in the case of a participant who dies after the date on which the participant attained the earliest retirement age, such participant had retired with an immediate qualified joint and survivor annuity on the day before the participants date of death, or
(ii) in the case of a participant who dies on or before the date on which the participant would have attained the earliest retirement age, such participant had
(I) separated from service on the date of death,
(II) survived to the earliest retirement age,
(III) retired with an immediate qualified joint and survivor annuity at the earliest retirement age, and
(IV) died on the day after the day on which such participant would have attained the earliest retirement age, and
(B) under the plan, the earliest period for which the surviving spouse may receive a payment under such annuity is not later than the month in which the participant would have attained the earliest retirement age under the plan.

In the case of an individual who separated from service before the date of such individuals death, subparagraph (A)(ii)(I) shall not apply.

(2) In the case of any individual account plan or participant described in subparagraph (B) or (C) of subsection (b)(1) of this section, the term qualified preretirement survivor annuity means an annuity for the life of the surviving spouse the actuarial equivalent of which is not less than 50 percent of the portion of the account balance of the participant (as of the date of death) to which the participant had a nonforfeitable right (within the meaning of section 1053 of this title).
(3) For purposes of paragraphs (1) and (2), any security interest held by the plan by reason of a loan outstanding to the participant shall be taken into account in determining the amount of the qualified preretirement survivor annuity.
(f) Marriage requirements for plan 

(1) Except as provided in paragraph (2), a plan may provide that a qualified joint and survivor annuity (or a qualified preretirement survivor annuity) will not be provided unless the participant and spouse had been married throughout the 1-year period ending on the earlier of
(A) the participants annuity starting date, or
(B) the date of the participants death.
(2) For purposes of paragraph (1), if
(A) a participant marries within 1 year before the annuity starting date, and
(B) the participant and the participants spouse in such marriage have been married for at least a 1-year period ending on or before the date of the participants death,

such participant and such spouse shall be treated as having been married throughout the 1-year period ending on the participants annuity starting date.

(g) Distribution of present value of annuity; written consent; determination of present value 

(1) A plan may provide that the present value of a qualified joint and survivor annuity or a qualified preretirement survivor annuity will be immediately distributed if such value does not exceed the amount that can be distributed without the participants consent under section 1053 (e) of this title. No distribution may be made under the preceding sentence after the annuity starting date unless the participant and the spouse of the participant (or where the participant has died, the surviving spouse) consent in writing to such distribution.
(2) If
(A) the present value of the qualified joint and survivor annuity or the qualified preretirement survivor annuity exceeds the amount that can be distributed without the participants consent under section 1053 (e) of this title, and
(B) the participant and the spouse of the participant (or where the participant has died, the surviving spouse) consent in writing to the distribution,

the plan may immediately distribute the present value of such annuity.

(3) 
(A) For purposes of paragraphs (1) and (2), the present value shall not be less than the present value calculated by using the applicable mortality table and the applicable interest rate.
(B) For purposes of subparagraph (A)
(i) The term applicable mortality table means a mortality table, modified as appropriate by the Secretary of the Treasury, based on the mortality table specified for the plan year under subparagraph (A) of section 1083 (h)(3) of this title (without regard to subparagraph (C) or (D) of such section).
(ii) The term applicable interest rate means the adjusted first, second, and third segment rates applied under rules similar to the rules of section 1083 (h)(2)(C) of this title for the month before the date of the distribution or such other time as the Secretary of the Treasury may by regulations prescribe.
(iii) For purposes of clause (ii), the adjusted first, second, and third segment rates are the first, second, and third segment rates which would be determined under section 1083 (h)(2)(C) of this title if
(I) section 1083 (h)(2)(D) of this title were applied by substituting the average yields for the month described in clause (ii) for the average yields for the 24-month period described in such section,
(II) section 1083 (h)(2)(G)(i)(II) of this title were applied by substituting section 1055 (g)(3)(B)(iii)(II) of this title for section 1082 (b)(5)(B)(ii)(II) of this title, and
(III) the applicable percentage under section 1083 (h)(2)(G) of this title were determined in accordance with the following table:
(h) Definitions 
For purposes of this section
(1) The term vested participant means any participant who has a nonforfeitable right (within the meaning of section 1002 (19) of this title) to any portion of such participants accrued benefit.
(2) 
(A) The term annuity starting date means
(i) the first day of the first period for which an amount is payable as an annuity, or
(ii) in the case of a benefit not payable in the form of an annuity, the first day on which all events have occurred which entitle the participant to such benefit.
(B) For purposes of subparagraph (A), the first day of the first period for which a benefit is to be received by reason of disability shall be treated as the annuity starting date only if such benefit is not an auxiliary benefit.
(3) The term earliest retirement age means the earliest date on which, under the plan, the participant could elect to receive retirement benefits.
(i) Increased costs from providing annuity 
A plan may take into account in any equitable manner (as determined by the Secretary of the Treasury) any increased costs resulting from providing a qualified joint or survivor annuity or a qualified preretirement survivor annuity.
(j) Use of participant’s accrued benefit as security for loan as not preventing distribution 
If the use of any participants accrued benefit (or any portion thereof) as security for a loan meets the requirements of subsection (c)(4) of this section, nothing in this section shall prevent any distribution required by reason of a failure to comply with the terms of such loan.
(k) Spousal consent 
No consent of a spouse shall be effective for purposes of subsection (g)(1) or (g)(2) of this section (as the case may be) unless requirements comparable to the requirements for spousal consent to an election under subsection (c)(1)(A) of this section are met.
(l) Regulations; consultation of Secretary of the Treasury with Secretary of Labor 
In prescribing regulations under this section, the Secretary of the Treasury shall consult with the Secretary of Labor.
[1] So in original. Probably should be “clauses”.
[2] So in original. There are two pars. designated (4) and no par. (3).