“Frontier school district” means a school district that meets either of the following conditions:

(a) The total number of pupils in average daily attendance at all of the schools served by the school district is fewer than 600.

(b) Each county in which a school operated by the school district is located has a total population density fewer than 10 persons per square mile.

(Added by Stats. 2022, Ch. 83, Sec. 1. (AB 2337) Effective January 1, 2023.)