(1) The department determines typical workweek hours based on whether the employee is salaried or otherwise at the time of filing the initial application for benefits.

(a) For salaried employees, as defined in WAC 192-500-100, the typical workweek hours are forty hours, regardless of the number of hours worked in the employee's qualifying period.

(b) For all other employees, the department will determine typical workweek hours by dividing the sum of all hours reported in the qualifying period by fifty-two and rounded down to the nearest hour.

(2) For a qualifying period that includes the fourth quarter of 2018, the typical workweek hours for an employee described in subsection (1)(b) of this section will be determined by dividing the sum of all hours reported in the first three quarters of 2019 by thirty-nine.