As used in this chapter, unless a different meaning is plainly required by the context:

(1) "Department" refers to the department of retirement systems established pursuant to chapter 41.50 RCW as now existing or hereafter amended.

(2) "Employers" refers to all employers within the retirement systems administered by the department, as defined in RCW 41.50.030.

(3) "Reports" refers to the department of retirement systems transmittal report sent each month by employers to the department.

(4) "Close of business" refers to 5:00 p.m. of a business day.

(5) "Standard administrative fee" for employers in the public employees', public safety employees', school employees', teachers', and law enforcement officers' and firefighters' retirement systems refers to the administrative fee provided for under RCW 41.50.110; for employers in the judges, judicial, and Washington state patrol retirement systems refers to the biennial appropriation that the department receives for administering each system.

(6) "Additional administrative fee" refers to the fee provided for under RCW 41.50.110(3) which is related to increased costs incurred by the department in processing deficient reports.