Applying for Green Card before 5th anniversary of H1B status

[af101010]

Hi

I have heard in the past from a lawyer that when in H1B status the filing of Green Card must be done and labor certification approved before the 5th anniversary of H1B status. In other words, one cannot start the process for a Green Card in the 6th year of H1B status.

Is this correct? Or is the lawyer being overly cautious?

If such a rule does exist can you please point me to the exact regulation?

Thanks!

[txh1b]

https://www.immihelp.com/h1-visa-extension-beyond-6-years-in-usa/