The main purpose of this legislation is to prevent individuals holding passports issued by the Palestinian Authority from entering the United States. The bill aims to enhance national security by restricting the admission of certain foreign nationals deemed to pose a potential threat. The key provisions of this legislation state that any person who holds a passport from the Palestinian Authority will not be allowed to enter the United States. This includes being ineligible for visas, admission, or parole, which means they cannot legally enter the country or receive any immigration benefits.