Job Recruitment Website - Immigration policy - Help translate a sentence

Help translate a sentence

The recommended practice is to apply for a re-entry permit using the form of the US Immigration Service before traveling.

According to 8 USC 10 1 1, legal permanent immigrants (lpr) who have left the United States for more than 180 days are an object of the new immigration review procedure.

I don't know how to translate that 8 USC 10 1 1. It's probably stipulated in the information about immigration policy.