The maximum area allowed to a district for attendance units in junior high schools composed of grades to 9, inclusive, or to 10, inclusive, as the case may be, shall be determined pursuant to this section, rather than Sections and 17046. This

section shall not apply to junior high schools composed of grades and only. The maximum area allowed for attendance units in junior high schools shall be determined by computing, in accordance with this section, the number of square feet for the attendance units at each junior high school attendance center of the district, and totaling the number of square feet so determined for all attendance units in all such junior high school attendance centers of the district. There shall be allowed a maximum area of square feet for each attendance unit of the junior high school attendance center in grades and 8.

For each attendance unit in grade 9, or grades and 10, as the case may be, at each junior high school attendance center, there shall be allowed a maximum area equal to the number of square feet which would be allowed under

Section for each attendance unit of an attendance center having a total number of attendance units equal to the total number of attendance units in grades to 9, inclusive, or to 10, inclusive, as the case may be, at such junior high school attendance center. The number of square feet which would be allowed under

Section for each attendance unit of an attendance center shall be computed by determining in accordance with that

section the total number of square feet which would be allowed at an attendance center and dividing such total number of square feet by the total number of attendance units at such attendance center.