If there will be more than a five month gap between your enrollment, you will require an 'Initial' I-20. This will be a completely new F-1 record.
Contact OIA ~3 months before you plan to return to the University. This will allow time for the creation and receipt of your new SEVIS record/I-20.
You must also coordinate with your department to submit the completed Academic and Financial Review (AFR) form and supporting financial documentation to OIA. You will be required to provide financial documentation to cover the amount listed as the “Difference*” in the lower right corner of page 2 of the AFR. We do not require physical copies of the financial statements.