On July 1 of each year, the department shall establish the minimum dollar level below which authority to acquire goods shall be delegated to state agencies that meet the requirements of Section 10333. The level established at eight hundred dollars ($800) on January 1, 1983, and adjusted on July 1, 1983, pursuant to former Section 14792.1 of the Government Code, shall be retained and adjusted each July 1 thereafter to reflect, at a minimum, the percentage change from April 1 of the prior year to April 1 of the current year in the California Consumer Price Index for all items, as determined by the California Department of Industrial Relations.