An agency may:
(a) Covenant as to the consideration or rents and fees to be charged in the sale or lease of a redevelopment project, the amount to be raised each year or other period of time by rents, fees, and other revenues, and as to their use and disposition.
(b) Create or authorize the creation of special funds for money held for redevelopment or other costs, debt service, reserves, or other purposes, and covenant as to the use and disposition of such money.