https://www.osc.state.ny.us/localgov..._debttypes.htm
Bond Anticipation Notes (BANs) - These are frequently issued as temporary financing for large construction projects and can be issued once a serial bond resolution has been adopted by the governing board. These one-year notes may be renewed for up to five years.
Bonds - Serial bonds offer a longer payback period with a stable schedule of repayment over the term of the issue. Most bonds are general obligation bonds, which are secured by the full taxing power of the local government.