5 C.F.R. § 841.707
COLA's affecting computation of survivor supplements
For purposes of computing the assumed CSRS annuity under § 843.308 of this chapter, the assumed CSRS annuity includes COLA's computed under CSRS rules.
For purposes of computing the assumed CSRS annuity under § 843.308 of this chapter, the assumed CSRS annuity includes COLA's computed under CSRS rules.