Washington Revised Code Title 80. Public Utilities § 80.36.555. Enhanced 911 service--Residential service required

By January 1, 1997, or one year after enhanced 911 service becomes available or a private switch automatic location identification service approved by the Washington utilities and transportation commission is available from the serving local exchange telecommunications company, whichever is later, any private shared telecommunications services provider that provides service to residential customers shall assure that the telecommunications system is connected to the public switched network such that calls to 911 result in automatic location identification for each residential unit in a format that is compatible with the existing or planned county enhanced 911 system.