Upon receipt of a petition or motion seeking a mandatory wage assignment that complies with RCW
9.94A.7701, the court shall issue a wage assignment order as provided in RCW
9.94A.7704 and including the information required in RCW
9.94A.7701, directed to the employer, and commanding the employer to answer the order on the forms served with the order that comply with RCW
9.94A.7706 within twenty days after service of the order upon the employer.