Form I-140 petition validity. The final rule clarifies the circumstances under which an approved Immigrant Petition for Alien Worker (Form I-140 petition) remains valid, even after the petitioner withdraws the petition or the petitioner’s business terminates, including for purposes of status extension applications filed on behalf of the beneficiary, job portability of H-1B nonimmigrants, and job portability under section 204(j) of the Immigration and Nationality Act (INA), 8 U.S.C. 1154(j). Second, the final rule made the changes consistent with the goals of AC 21 and ACWIA to further provide stability and flexibility in certain immigrant visa and nonimmigrant visa categories in the following areas:Establishment of priority dates.