(2) No union high school district shall extend the course of study in the union high school district unless such course of study is extended to include kindergarten and grades 1 through 12, of the schools in the union high school district.
(3) When a union high school district extends the course of study, the extension applies to all component school districts lying wholly within the union high school district. [Amended by 1965 c.100 §216; 1967 c.106 §1; 1987 c.195 §2; 1993 c.45 §70; 1993 c.329 §5; 1997 c.521 §20]