Section 7905 Of Chapter 3. Telegraph Or Telephone Corporations From California Public Utilities Code >> Division 4. >> Chapter 3.

. The Public Utilities Commission shall issue regulations requiring every telephone corporation subject to its jurisdiction to maintain complete records of all instances in which its employees discover any device installed for the purpose of overhearing communications over the lines of such corporation and all instances in which such employees reasonably believe and report to the corporation their belief that such device is installed or has been installed but has since been removed.