The standard administrative fee for employers in the judges retirement system, the judicial retirement system, and the Washington state patrol retirement system for a six-month period is one-fourth of the biennial appropriation the department receives for administering each system. The maximum additional administrative fee that may be charged to employers in the judges, judicial, and Washington state patrol retirement systems for any six-month period shall not exceed fifty percent of the standard administrative fee due for that six-month period. The maximum additional administrative fee that may be assessed is determined as follows:

1) If the additional administrative fee as determined in accordance with WAC 415-115-080 is less than fifty percent of the standard administrative fee, the additional administrative fee is the maximum fee allowable.

2) If the additional administrative fee as determined in accordance with WAC 415-115-080 is greater than or equal to fifty percent of the standard administrative fee, fifty percent of the standard administrative fee is the maximum fee allowable.