Clarification on H1-B 60 day grace period

Hi Anil and Members,

My extension is approved last month and I have i-94 for 3 years. However the project is ending and i might need to exit the company by end of this year.

Assuming my last working day is Dec 31st 2021, before March1st 2022 do I need to start working/I9 is submitted with new employer or is it okay if H1 transfer is submitted and I can work let’s say from March 15th.

H1B 60 day Grace USCIS Rule (Lay off, Start Date, Severance?) - USA H1B 60 day Grace USCIS Rule (Lay off, Start Date, Severance?) - USA