Section 1 Protecting older, longer service participants
“(4) Nondiscrimination
“(A) In general—A trust shall not constitute a qualified trust under this section unless the contributions or benefits provided under the plan do not discriminate in favor of highly compensated employees (within the meaning of section 414(q)). For purposes of this paragraph, there shall be excluded from consideration employees described in section 410(b)(3) (A) and (C).
“(B) Protection of older, longer service participants
“(i)
“(I) A defined benefit plan described in subclause (II) shall not fail to satisfy this paragraph with respect to plan benefits, rights, or features by reason of—
“(aa) the composition of the closed class of participants described in subclause (II), or
“(bb) the benefits, rights, or features provided to such closed class.
“(II) A plan is described in this subclause if—
“(aa) the plan provides benefits, rights, or features to a closed class of participants,
“(bb) such closed class and such benefits, rights, and features satisfy the requirements of subparagraph (A) (without regard to this clause) as of the date that the class was closed, and
“(cc) after the date as of which the class was closed, any plan amendments that modify the closed class or the benefits, rights, and features provided to such closed class satisfy subparagraph (A) (without regard to this clause).
“(ii)
“(I) A defined contribution plan described in subclause (II) shall be permitted to be tested on a benefits basis.
“(II) A defined contribution plan is described in this subclause if—
“(aa) the plan provides make-whole contributions to a closed class of participants whose defined benefit plan accruals have been reduced or eliminated,
“(bb) such closed class of participants satisfies section 410(b)(2)(A)(i) as of the date that the class of participants was closed, and
“(cc) after the date as of which the class was closed, any plan amendments that modify the closed class or the allocations, benefits, rights, and features provided to such closed class satisfy subparagraph (A) (without regard to this clause).
“(III) In addition to other testing methodologies otherwise applicable, for purposes of determining compliance with this paragraph and with section 410(b) of the portion of one or more defined contribution plans described in subclause (II) that provide make-whole contributions, such portion of such plans may be aggregated and tested on a benefits basis with the portion of one or more defined contribution plans that—
“(aa) provides matching contributions (as defined in subsection (m)(4)(A)), or
“(bb) consists of an employee stock ownership plan within the meaning of section 4975(e)(7) or a tax credit employee stock ownership plan within the meaning of section 409(a).
“(C) Definitions—For purposes of this paragraph—
“(i) Make-whole contributions—The term make-whole contributions means allocations for each employee in the class that are reasonably calculated, in a consistent manner, to replace some or all of the retirement benefits that the employee would have received under the defined benefit plan and any other plan or arrangement if the employee had continued to benefit at the same level under such defined benefit plan and such other plan or arrangement.
“(ii) References to closed class of participants—References to a closed class of participants and similar references to a closed class shall include arrangements under which one or more classes of participants are closed.
“(D) Protecting grandfathered participants in defined benefit plans
“(i) One or more defined benefit plans described in clause (ii) shall be permitted to be tested on a benefits basis with one or more defined contribution plans.
“(ii) A defined benefit plan is described in this clause if—
“(I) the plan provides benefits to a closed class of participants,
“(II) the plan and such benefits satisfy the requirements of subparagraph (A) (without regard to this subparagraph) as of the date the class was closed, and
“(III) after the date as of which the class was closed, any plan amendments that modify the closed class or the benefits provided to such closed class satisfy subparagraph (A) (without regard to this subparagraph).
“(iii) In addition to other testing methodologies otherwise applicable, for purposes of determining compliance with this paragraph and with section 410(b) of one or more defined benefit plans described in clause (ii), such plans may be aggregated and tested on a benefits basis with the portion of one or more defined contribution plans that—
“(I) provides matching contributions (as defined in subsection (m)(4)(A)), or
“(II) consists of an employee stock ownership plan within the meaning of section 4975(e)(7) or a tax credit employee stock ownership plan within the meaning of section 409(a).
“(E) Rules—The Secretary may prescribe rules designed to prevent abuse of the plan designs otherwise permitted by reason of subparagraphs (B) and (D). Such rules shall be directed towards abuses under which the defined benefit plan was established within a specified period prior to the date that—
“(i) the class of participants described in subparagraphs (B)(i)(II)(aa), (B)(ii)(II)(aa), and (D)(ii)(I) is closed, or
“(ii) the defined benefit plan accruals have been reduced or eliminated, in the case of the make-whole contributions described in subparagraph (C).
“(F) Transition rules—Within one year after the date of enactment of the Retirement Plan Simplification and Enhancement Act of 2013, the Secretary shall prescribe rules that facilitate the use of the provisions of subparagraphs (B) and (D) without regard to—
“(i) whether the closing of the class of participants referred to in such subparagraphs occurred before or after such date of enactment, or
“(ii) plan amendments that were adopted or effective before such date of enactment and that would not have been necessary if subparagraphs (B) and (D) had been in effect.”
“(I) Protected participants—A plan described in this subparagraph shall be deemed to satisfy the requirements of subparagraph (A). A plan is described in this paragraph if—
“(i) the plan is amended to—
“(I) cease all benefit accruals, or
“(II) provide future benefit accruals only to a closed class of participants, and
“(ii) the plan satisfies subparagraph (A) (without regard to this subparagraph) as of the effective date of the amendment.”