Sec. 52.17  Costs of number administration.

    All telecommunications carriers in the United States shall 
contribute on a competitively neutral basis to meet the costs of 
establishing numbering administration.
    (a) For each telecommunications carrier, such contributions shall be 
based on the gross revenues from the provision of its telecommunications 
services.
    (b) The contributions in paragraph (a) of this section shall be 
based on each contributor's gross revenues from its provision of 
telecommunications services reduced by all payments for 
telecommunications services and facilities that have been paid to other 
telecommunications carriers.