I've applied for a green card through my employer, but the process is taking longer than expected. Can I change jobs or employers while my application is pending?

Under the American Competitiveness in the Twenty-First Century Act (AC21), certain employment-based green card applicants may be eligible to change jobs or employers without abandoning their application.

To be eligible for portability, you must meet specific requirements, such as having an approved I-140 petition and being in a similar occupation