Self Help - J1-Waiver transfer

I succesfully transferred waivers in march to a VA hospital as hospitalist and Really happy with my new job.
There is no exploitation and is a really good job. I ll stay here even after I m done with green card.
I filed premium processing and it took 11 days.
Hello. Any idea what happens when a facility closes? How much grace period do we get to find a new job and transfer the waiver?