School districts eligible for funding as a small high school district pursuant to the state operating appropriations act shall be eligible to participate in a cooperative project: PROVIDED, That the superintendent of public instruction may adopt rules permitting second-class school districts that are not eligible for funding as a small high school district in the state operating appropriations act to participate in a cooperative project.
Two or more school districts may participate in a cooperative project pursuant to RCW 28A.340.020 through 28A.340.070.