(a) A district or a nonprofit corporation acting in concert with a district may maintain a revolving fund to be held in trust by a banking institution chosen by the board of directors of the district or the board of directors of a nonprofit corporation acting in concert with a district separate from any other funds and administered by the board of directors.
(b) A district may transfer into its revolving fund money from any permissible source, including without limitation:(1) Bond revenues;(2) Contributions; and(3) Financings.
(1) Bond revenues;
(2) Contributions; and
(3) Financings.