I-140 approved - Employer change

[venkat_h1bvisa]

 I have approved I-140 with my current employer(A) and I've used my 6-year h1b term and nine years completed on H1b.

 I'm transferring my H1b to new employer (B) now  using approved I-140 from employer A. 

 New position with employer B is contract to hire position for end client C. After few months(max 6months) I'll be moving to employer/client C.

 

My question is during this time, my current employer revoke/cancel I-140 then,

 

Am I eligible to  transfer my h1b with employer C in that case?

Employer B is also required to start my PERM process OR is it optional?

 

[NP2020]

You should get 3yr extension with employer C unless employer A revokes I140 due to fraud. 

Employer B does not need to file Perm if your intent is to join Emp C.