To identify and distinguish the revenues received by the southwest water authority from water user entities for replacement and extraordinary maintenance of the southwest pipeline project, there must be maintained a fund to be designated as the southwest pipeline project reserve fund for replacement. All moneys received by the southwest water authority, whether from payments made by water user entities, or otherwise, for replacement and extraordinary maintenance of the southwest pipeline project, which are by law or by other authoritative designation made applicable to replacement of the southwest pipeline project, must be kept by the southwest water authority in the fund distinct from all other moneys and may be disbursed only for the particular purpose for which the moneys were received.