No person other than the following may appear in a representative capacity before the commission or before an administrative law judge for a human rights hearing:

(1) Washington lawyer. An attorney at law entitled to practice before the supreme court of the state of Washington;

(2) Other lawyer. An attorney at law entitled to practice before the highest court of record of any other state, if attorneys at law of the state of Washington are permitted to appear in a representative capacity before administrative agencies of such other state, and if not otherwise prohibited by Washington law;

(3) Legal intern. A legal intern licensed to engage in the practice of law in the state of Washington under admission to practice Rule 9;

(4) Officer, etc. A bona fide officer, partner, or full time employee of an association, partnership, or corporation appearing for the association, or one of its members for the partnership, or corporation.