§  54.901   Calculation of Interstate Common Line Support.

   (a) Interstate Common Line Support available to a rate-of-return
   carrier shall equal the Common Line Revenue Requirement per Study Area
   as calculated in accordance with part 69 of this chapter minus:

   (1) The study area revenues obtained from end user common line charges
   at their allowable maximum as determined by § § 69.104(n) and 69.104(o)
   of this chapter;

   (2) The carrier common line charge revenues to be phased out pursuant
   to § 69.105 of this chapter;

   (3) The special access surcharge pursuant to § 69.114 of this chapter;

   (4) The line port costs in excess of basic analog service pursuant to
   § 69.130 of this chapter; and

   (5) Any Long Term Support for which the carrier is eligible or, if the
   carrier ceased participation in the NECA common line pool after October
   11, 2001, any Long Term Support for which the carrier would have been
   eligible if it had not ceased its participation in the pool.

   (b) The per-line Interstate Common Line Support available to a
   competitive eligible telecommunications carrier serving lines in a
   study area served by a rate-of-return carrier shall be calculated by
   the Administrator as follows:

   (1) If the rate-of-return carrier has disaggregated the support it
   receives in the study area pursuant to § 54.315, the Administrator shall
   calculate the amount of Interstate Common Line Support targeted to each
   disaggregation zone by the rate-of-return carrier (targeted Interstate
   Common Line Support). If the rate-of-return carrier has chosen not to
   disaggregate its support for a study area pursuant to § 54.315, then the
   entirety of its Interstate Common Line Support for the study area shall
   be considered targeted Interstate Common Line Support for purposes of
   performing the calculations in this section.

   (2) In each disaggregation zone or undisaggregated study area, the
   Administrator shall calculate the Average Interstate Common Line
   Support by dividing the rate-of-return carrier's targeted Interstate
   Common Line Support by its total lines served.

   (3) The Administrator shall then calculate the Interstate Common Line
   Support available to the competitive eligible telecommunications
   carrier for each line it serves for each customer class in a
   disaggregation zone or undisaggregated study area by the following
   formula:

   (i) If the Average Interstate Common Line Support is greater than $2.70
   multiplied by the number of residential and single-line business lines
   served by the rate-of-return carrier in the disaggregation zone or
   undisaggregated study area, then:

   (A) Interstate Common Line Support per Multi-Line Business Line =
   (Average Interstate Common Line Support − $2.70 × residential and
   single-line business lines served by the rate-of-return carrier) ÷
   (total lines served by the rate-of-return carrier); and

   (B) Interstate Common Line Support per Residential and Single-Line
   Business Line = Interstate Common Line Support per Multi-Line Business
   Line + $2.70.

   (ii) If the Average Interstate Common Line Support is less than or
   equal to $2.70 multiplied by residential and single-line business lines
   served by the rate-of-return carrier in the disaggregation zone or
   undisaggregated study area, but greater than $0, then:

   (A) Interstate Common Line Support per Multi-Line Business Line = $0;
   and

   (B) Interstate Common Line Support per Residential and Single-Line
   Business Line = Average Interstate Common Line Support ÷ residential
   and single line business lines served by the rate-of-return carrier.

   (iii) If the Average Interstate Common Line Support is equal to $0,
   then the competitive eligible telecommunications carrier shall receive
   no Interstate Common Line Support for lines served in that
   disaggregation zone or undisaggregated study area.