Each project will have some variation of this contractual structure depending on its particular requirements: not all BOT projects require a guaranteed delivery of inputs, so a fuel/input supply contract may not be required. Cash flow can be made in part or in full by public tariffs and not by a purchaser. A BOT (Build Operate Transfer) project is typically used to develop a discrete asset and not an entire network, and is usually completely new or in the green meadow (although a renovation may be required). In the context of a BOT project, the project company or operator usually generates its revenue through a royalty charged to the supplier/government and not through tariffs charged to consumers. In common law, a number of projects are called concessions, such as.B.