The director shall impose and collect assessments each fiscal year upon all self-insurers in the amount of the estimated costs of administering their portion of this title during such fiscal year. These assessments shall also include the assessments for the ombuds's office provided for in RCW
51.14.390. The time and manner of imposing and collecting assessments due the department shall be set forth in regulations promulgated by the director in accordance with chapter
34.05 RCW.