Report of member data—Department-designed format.
Employers, as defined in RCW 41.26.030, 41.32.010, 41.34.020, 41.35.010, and 41.40.010, must report all member data to the department in a format designed and communicated by the department. Employers failing to comply with this reporting requirement shall be assessed an additional fee as defined under RCW 41.50.110(5).