When so authorized by the districting plan, one or more district court commissioners may be appointed in any district by the judges of the district. Each commissioner shall be a registered voter of the county in which the district or a portion thereof is located, and shall hold office at the pleasure of the appointing judges. For purposes of this section, "appointing judge" includes a presiding judge pro tempore fulfilling presiding judge duties for a single judge court pursuant to RCW
3.34.100(2) or
3.34.150(2). Any person appointed as a commissioner authorized to hear or dispose of cases shall be a lawyer who is admitted to the practice of law in the state of Washington or who has passed the qualifying examination for lay judges as provided under RCW
3.34.060.