The joint powers entity shall be subject to the same budget, expenditure, appropriation, accounting, auditing, and program requirements as school districts and county superintendents of schools generally with respect to school transportation programs and food services programs. Employees of the Newhall School District, the William S. Hart Union High School District, the Sulphur Springs Union School District, the Saugus Union School District, or the Castaic Union School District who become employees of a joint powers entity that has as its sole function the provision of school food services, pursuant to the participation of their respective schools in the joint powers entity, shall be entitled to carry over their seniority upon transfer to the joint powers entity.