(1) In any proceeding before an administrative law judge involving a dispute of an employee's initial determination, claim for waiting period credit or claim for benefits, all matters and provisions of this title relating to the employee's initial determination, or right to receive such credit or benefits for the period in question, shall be deemed to be in issue irrespective of the particular ground or grounds set forth in the notice of appeal in single employee cases.

(2) In any proceeding before an administrative law judge involving an employee's right to benefits, all parties shall be afforded an opportunity for hearing after not less than seven days' notice in accordance with RCW 34.05.434.

(3) In any proceeding involving an appeal relating to benefit determinations or benefit claims, the administrative law judge, after affording the parties reasonable opportunity for fair hearing, shall render its decision affirming, modifying, or setting aside the determination or decisions of the department. The parties shall be duly notified of such decision together with the reasons, which shall be deemed to be the final decision unless, within thirty days after the date of notification or mailing, whichever is the earlier, of such decision, further appeal is perfected pursuant to RCW 50A.50.080.