A unique form of financing used by cities, counties, and other similar districts in order to fund large-scale products in that district such as the construction of schools or roads. In order to be able to use this kind of financing, the voters in the district must approve the formation of a Mello-Roos district by a vote (two-thirds must be in favor of the decision). Once the district has decided to become a Mello-Roos district, the money spent to finance one of these projects is repaid by the voters through taxes. This is officially called the Community Facilities District Act, but is commonly called Mello-Roos due to Senator Mello and assemblyman Roos who co-authored the act.