The above is a simple explanation which does not cover the mining, shipping, and delivery contracts involved in importing the coal (which in itself could be more complex than the financing scheme), nor the contracts for delivering the power to consumers. In developing countries, it is not unusual for one or more government entities to be the primary consumers of the project, undertaking the "last mile distribution" to the consuming population. The relevant purchase agreements between the government agencies and the project may contain clauses guaranteeing a minimum offtake and thereby guarantee a certain level of revenues. In other sectors including road transportation, the government may toll the roads and collect the revenues, while providing a guaranteed annual sum (along with clearly specified upside and downside conditions) to the project. This serves to minimise or eliminate the risks associated with traffic demand for the project investors and the lenders.