Reg. New PERM requirements when joining previous employer having approved I140

[Senthil M 0]

Hi,

    I have moved to Company B, and they are in the process of filing GC (waiting for PERM certification).

    I was previously with Company A, who have my I140 approved for EB2 category (PD 08/01/2013). If I join back the previous employer, would that require to file PERM again? Or can my previous employer be able to file an EB3 downgrade using my previous I140?

   My elder son is aging out in Nov'21 - so I am looking for options to include him in my GC applications. Appreciate your help on this.

Thanks,

Senthil