You must be physically present in the United States when you file the Reentry Permit application. Approval of this form is required in advance of travel, except in extraordinary circumstances.Please read these instructions carefully to properly complete this form. If you need more space to complete an answer, use a separate sheet(s) of paper. Use Form I131 Application for Travel Document. For permanent residents, the re-entry permit is valid for two years from the date of issue. How To Fill Out Form I-131. 1. Appropriation Number: Insert the appropriation number against which travel purchases are to be encumbered and expended. 6. Hi good people of the Internet , I need some advice regarding ILR application and requirements.