(1) Within thirty days of receipt of an application for adjudicative proceeding or petition, the commission shall notify the applicant of any obvious errors or omissions, request any additional information it requires and is permitted by law to require regarding the application for adjudicative proceeding or petition, and notify the applicant of the name, mailing address, and telephone number that may be contacted regarding the application.

(2) Within sixty days after receipt of the application, the commission shall commence an adjudicative proceeding by serving notice of hearing on the applicant and all other persons required by RCW 34.05.434; 34.05.417 (1)(b), or decide not to conduct an adjudicative proceeding and furnish the applicant with a copy of its decision in writing, with a brief statement of its reasons for doing so and of any administrative review available.