This excerpt taken from the PCG 10-K filed Feb 18, 2005.
Transmission Access Charge
In March 2000, the ISO filed an application with the FERC seeking to establish its own transmission access charge as directed by AB 1890. The ISO's transmission access charge methodology provides for transition to a uniform statewide high-voltage transmission rate, based on the revenue requirements of all participating transmission owners associated with facilities operated at 200 kV and above. The transmission access charge methodology also requires the Utility and other transmission owners, during a ten-year transition period, to pay a charge intended to reimburse other transmission owners (who are generally new ISO participants) whose costs are higher than that embedded in the uniform rate. Under the ISO's application, the Utility's obligation for this cost differential would be capped at $32 million per year during the ten-year transition period. In December 2004, the FERC issued an Order in this proceeding accepting the ISO's transmission access charge methodology.