(1) The superintendent of public instruction shall biennially review and adopt the core services funding formula for educational service districts based upon RCW 28A.310.340, 28A.310.350 and the considerations set forth in this section.

(2) The core services funding formula shall be established to identify basic, uniform services to be provided to school districts and to the superintendent of public instruction by educational service districts.

(3) The core funding formula provides for the equalization of services by educational service districts based on geographical features, number and size of districts served, and facility requirements.

(4) All educational service districts shall be allocated the following positions without regard to size:

(a) Superintendent;

(b) Executive secretary;

(c) Receptionist;

(d) Internal accountant;

(e) Secretary; and

(f) Certification clerk.

(5) All other positions in addition to those specified in subsection (4) of this section, both professional and clerical, shall be allocated on the basis of workload, e.g., total number of school districts, number of second-class school districts, number of online computer reports required. These positions shall be allocated to the educational service districts in the following manner:

(a) To provide fiscal office support to school districts most in need, allocations shall be based on the number of second-class school districts served.

(b) In the case of terminal operators, allocation shall be on a workload basis associated with the amount of hours required to process state reports.

(c) The level of curriculum and instruction services provided by educational service districts shall be based on the number of school districts served, regardless of district enrollment.

(6) Travel expenses shall be based on a mileage factor calculated for each educational service district. The factor shall be calculated by measuring the distance between each school district headquarters and the respective educational service district headquarters and obtaining the total mileage for the educational service district. The total mileage shall be multiplied by the number of professional staff allocated to the respective educational service district. The product shall then be multiplied by a standard dollar amount to be determined by the superintendent of public instruction after consultation with the Educational Service District Superintendents' Association.

(7) The expenses of board members shall be provided for in the formula by allocating a dollar amount to be determined by the superintendent of public instruction after consultation with the Educational Service District Superintendents' Association for each educational service district board member.

(8) Maintenance and operation expenditures shall be provided in the formula by allocating a dollar amount to be determined by the superintendent of public instruction after consultation with the Educational Service District Superintendents' Association for each core staff position.

(9) The annual housing costs for each educational service district shall be agreed upon by the educational service district superintendents and approved by the superintendent of public instruction or his or her designee.

(10) Total compensation of core positions shall be allocated in accordance with the state biennial appropriations act.

(11) Unique situations may dictate exceptions to the formula which shall be recommended by the Educational Service District Superintendents' Association and approved by the superintendent of public instruction or his or her designee.

(12) The elements set forth in subsections (1) through (11) of this section shall:

(a) Serve as basis for preparing biennial budget requests to the regular sessions of the Washington state legislature; and

(b) Be considered in the approval or disapproval of the annual budgets of the educational service districts by the superintendent of public instruction.