This excerpt taken from the PCG 10-K filed Feb 18, 2005.
4.6. TOs Control Centers.
4.6.1 ISO's Right to Occupy Participating TOs Control Centers. From the ISO Operations Date until the date when, in the reasonable opinion of the ISO, the ISO Control Center is established in accordance with Section 22.214.171.124 of the ISO Tariff, each Participating TO shall allow the ISO access to and such rights to occupy the Participating TO's existing control centers as the ISO reasonably requires for the purposes of exercising Operational Control of the ISO Controlled Grid.
4.6.2 Confidentiality. The parties to this Agreement shall implement Section 4.6.1 in conformity with the confidentiality requirements of Section 26.3.