(1) A school district collective bargaining agreement for certificated instructional staff that is executed or modified after July 6, 2017, and that is in effect for the 2018-19 school year may not increase average total salary for the 2018-19 school year, including supplemental contracts, in excess of the following:
(a) Annual salary inflationary adjustments based on the rate of the yearly increase of the previous calendar year's annual average consumer price index, using the official current base compiled by the bureau of labor statistics, United States department of labor, for the city of Seattle;
(b) Annual experience and education salary step increases according to the salary schedule specified in the agreement;
(c) Salary changes for staffing increases due to enrollment growth or state-funded increases under RCW 28A.150.260
(d) Salary changes to provide professional learning under RCW 28A.415.430
(e) Increases related to bonuses for attaining certification from the national board for professional teaching standards;
(f) School districts with an average total certificated instructional staff salary less than the statewide average certificated instructional staff salary allocation used to distribute funds for basic education as estimated by the office of the superintendent of public instruction for the 2018-19 school year may provide salary increases up to the statewide average allocation; or
(g) Salaries for new certificated instructional staff hired in the 2018-19 school year.
(2) Changes to any terms of an employment contract for nonrepresented employees must comply with the same requirements established in this section.
(3) This section expires August 31, 2019.