47 CFR 54.1301: General.

(a) This subpart addresses support for loop-related costs included in § 54.1308. The expense adjustment calculated pursuant to this subpart M shall be added to interstate expenses and deducted from state expenses after expenses and taxes have been apportioned pursuant to subpart D of part 36 of this chapter. Beginning January 1, 2012, this subpart will only apply to incumbent local exchange carriers that are rate-of-return carriers not affiliated, as “affiliated companies” are defined in § 32.9000 of this chapter, with price cap local exchange carriers. Rate-of-return carriers and price cap local exchange carriers are defined pursuant to § 54.5 and § 61.3(bb) of this chapter, respectively.

(b) The expense adjustment will be computed on the basis of data for a preceding calendar year.