(1) The commission has available to all persons at its offices in Olympia a current index which provides identifying information as to the following records issued, adopted or promulgated by the commission:

(a) Minutes of commission meetings;

(b) Those statements of policy and interpretations of policy, statute and the constitution which have been adopted by the commission;

(c) Administrative staff manuals and instructions to staff that affect a member of the public;

(d) Planning policies and goals, and interim and final planning decisions;

(e) Factual staff reports and studies, factual consultant's reports and studies, scientific reports and studies, and any other factual information derived from tests, studies, reports or surveys, whether conducted by public employees or others.

(2) A system of indexing for identification and location of the following records is hereby established by the commission. Such records shall include the following:

(a) Final orders entered after June 30, 1990, issued in adjudicative proceedings as defined in RCW 34.05.010(1) that contain an analysis or decision of substantial importance to the agency in carrying out its duties.

(b) Declaratory orders entered after June 10, 1990, that contain an analysis or decision of substantial importance to the agency in carrying out its duties.

(c) Interpretative statements as defined in RCW 34.05.010(8).

(d) Policy statements entered after June 30, 1990, as defined in RCW 34.05.010(14).

(3) A system of indexing shall be as follows:

(a) The indexing system will be administered by the commission's rules coordinator and located at the Washington traffic safety commission.

(b) Copies of all indexes shall be available for public inspection and copying in the manner provided for the inspection and copying of public records.

(c) The rules coordinator shall establish and maintain a separate index for each item contained in subsection (1)(a) through (e) of this section as follows:

(i) The index shall list all final orders and declaratory orders selected by the commission that contain decisions of substantial importance to the agency which orders shall be listed alphabetically by the titles of the hearing or controversy and shall contain a phrase describing the issue or issues and relevant citations of law.

(ii) Interpretative statements and policy statements shall be indexed by the applicable program administered by the commission.

(d) The rules coordinator shall update all indexes at least once a year and shall revise such indexes when deemed necessary by the commission.