Sec. 51.503  General pricing standard.

    (a) An incumbent LEC shall offer elements to requesting 
telecommunications carriers at rates, terms, and conditions that are 
just, reasonable, and nondiscriminatory.
    (b) An incumbent LEC's rates for each element it offers shall comply 
with the rate structure rules set forth in Secs. 51.507 and 51.509, and 
shall be established, at the election of the state commission--
    (1) Pursuant to the forward-looking economic cost-based pricing 
methodology set forth in Secs. 51.505 and 51.511; or
    (2) Consistent with the proxy ceilings and ranges set forth in 
Sec. 51.513.
    (c) The rates that an incumbent LEC assesses for elements shall not 
vary on the basis of the class of customers served by the requesting 
carrier, or on the type of services that the requesting carrier 
purchasing such elements uses them to provide.