H1 B change of Job, h4 ead

[jay25oct]

Hello Friends,

My current situation is as below

I am on h1b and my project is ending soon. I have approved I-140 and waiting for h4 EAD (expected to get it by next month). Based on this scenario 

1) If I get new project near by current location i know i don't have to file an amendment , but if new location is some other state i would have to file it. In that case i should file for  h4 EAD again?

2)whats the duration of H4 EAD? Me and My wife's I -94 is valid until Sep 2019, So I hope H4 EAD will be valid until Sep 2019. But what will be validity in this case?

3) She can not work until new EAD is approved even though she had previously approved EAD?

 

Thanks for replies.