The Supplemental Law Enforcement Services Account (SLESA) in each county or city is to be expended exclusively as required by this chapter. Moneys in that fund shall not be transferred to, or intermingled with, the moneys in any other fund in the county or city treasury, except that moneys may be transferred from the SLESA to the county’s or city’s general fund to the extent necessary to facilitate the appropriation and expenditure of those transferred moneys in the manner required by this chapter.