After all of the needed paperwork is filled out, you must go to the Pima County. Pima County can fund an organization to operate a Community Bond Program.What Can Cause the Yield Curve to Change? Bonds have an inverse relationship to interest rates. When interest rates rise, bond prices usually fall, and vice-versa. This 5-year HUD Consolidated Plan and the City of Tucson and Pima County Federal Fiscal Year Action Plans follow. HUD's required format.