To be given preference to work in Washington courts, interpreters must be certified court interpreters. In each case or hearing, courts are encouraged to make every effort possible to hire certified court interpreters and determine whether an intermediary interpreter is necessary. Courts are strongly encouraged to secure services of a team of interpreters, one sign language interpreter accompanied by an intermediary interpreter in all communication encounters. The certified court interpreters may only be released pursuant to RCW 2.42.150.