Section 105(c) of AC21 :
provides that a "petition under subsection (a)(1)(D) for an individual whose application for adjustment of status pursuant to section 245 has been filed and remained unadjudicated for 180 days or more shall remain valid with respect to a new job if the individual changes jobs or employers if the new job is in the same or a similar occupational classification as the job for which the petition was filed." If an I-140/I-485 are filed and remain unadjudicated for more than 180 days, and the beneficiary/applicant changes employers but continues in the same or similar occupation, then the I-140, if favorably adjudicated, should remain valid.