Ed. Code, § 89047

(a) The trustees and the governing board of any school district within which a campus of the California State University is located may enter into an agreement providing for the leasing by the state of a school building of the school district for use by the campus as a laboratory demonstration elementary school on terms and conditions that may be agreed upon by the trustees and the governing board of the school district except as otherwise provided in this section.

(b) The lease may be for a period not to exceed 20 years and, in addition to any other terms and conditions set forth therein, shall do all of the following:

(1) Require the school district to maintain the building at its own expense.

(2) Require the campus to maintain a school therein open to pupils of the school district residing in the attendance district for the school as established by the governing board of the district.

(3) Require the school district to pay annually to the state on or before the end of each fiscal year an amount determined by computing the current expenditures per pupil in the elementary schools of the district for the fiscal year and multiplying the amount so computed by the average daily attendance for the fiscal year in the school in excess of 400.

(c) Only the average daily attendance in the school in excess of 400 shall be credited to the school district.

(d) The average daily attendance of pupils in the school shall be computed separately in the same manner as the average daily attendance in other schools of the same grade maintained by the school district.