All necessary expenses incurred by the governing body of any school district in carrying out the purposes of this chapter are a charge against the funds of the district from whatever source the funds have been received. All the expenditures shall be made in the same manner as funds are expended for other school purposes.
Nothing in this chapter shall be construed to change in any way existing laws regarding the use of school grounds or school buildings by governing boards of school districts, except as specifically provided in this chapter.