(1) In computing any period of time prescribed or allowed by any applicable statute or rule, RCW 1.12.040 shall apply;

(2) When the period of time prescribed or allowed is less than seven days, intermediate Saturdays, Sundays and legal holidays shall be excluded in the computation;

(3) Whenever a person has the right to request a hearing or other proceeding within a prescribed period after "notice is given" by the department under Title 46 RCW or 308 WAC, such notice is deemed to be given on the third day after the notice is deposited into the state mailing service;

(4) Whenever a person has the right to request a hearing or other proceeding within a prescribed period after "receiving notice" from the department under Title 46 RCW or 308 WAC, such notice is deemed to be "received" by a person on the third day after the notice is deposited into the state mailing service;

(5) A request for a hearing or interview under Title 46 RCW is deemed complete on the day the request is postmarked or, if sent electronically, the date the request is received by the department, and the department is deemed to be in receipt of the hearing or interview request on the third day after the request is postmarked.