(5) Definitions For purposes of this subsection— (A) Funding restoration status A CSEC plan shall be treated as in funding restoration status for a plan year if the plan’s funded percentage as of the beginning of such plan year is less than 80 percent. (B) Funded percentage The term “funded percentage” means the ratio (expressed as a percentage) which— (i) the value of plan assets (as determined under subsection (c)(2)), bears to (ii) the plan’s funding liability. (C) Funding liability The term “funding liability” for a plan year means the present value of all benefits accrued or earned under the plan as of the beginning of the plan year, based on the assumptions used by the plan pursuant to this section, including the interest rate described in subsection (b)(5)(A) (without regard to subsection (b)(5)(B)). (D) Spread gain funding method The term “spread gain funding method” has the meaning given such term under rules and forms issued by the Secretary. (E) Plan sponsor The term “plan sponsor” means, with respect to a CSEC plan, the association, committee, joint board of trustees, or other similar group of representatives of the parties who establish or maintain the plan.