"Official public records" means all original or most important copies of vouchers, receipts, and other documents necessary to isolate and prove the validity of every transaction relating to the receipt, use, and disposition of all public property and public income from all sources whatever; all agreements and contracts to which the state of Washington or any agency thereof may be a party; all fidelity, surety, and performance bonds; all claims filed against the state of Washington or any agency thereof; all records and documents required by law to be filed with or kept by the state of Washington or any agency thereof; all legislative records as defined in section 2, chapter 1, Laws of 1971, ex. sess., and chapter 2, Laws of 1971 ex. sess.; and all other documents or records determined by the state or local records committees to be official public records.