Petitions to the commission for the promulgation, amendment, or repeal of a rule under RCW 34.05.330 shall include a statement of the reasons for the requested action, and may be accompanied by a brief of any applicable law. Petitions for the promulgation of a rule shall set out the full text of the proposed rule. Petitions for the amendment of a rule shall identify the rule by its WAC number, and shall contain the complete text of the rule as proposed to be amended, showing additions by underlining the new words and showing deletions by marking them over with a dotted line. Petitions for repeal of a rule shall identify the rule by WAC number, and may quote its text.