General Green Card

I am assuming the situation is that the husband's AOS is pending and he is using AC21 portability. That said, she is entitled to follow to join because she was (is) married to him before his green card got approved. There is NO requirement that a spouse must on a derivative visa (like H-4) in order to follow to join. She can follow to join even if she is outside USA, OR on F-1, H-1, L-1 or any independent visa. She will have to stay outside USA if her H-1 is denied, unless he revives his H-1 and brings her back on H-4.

Pursuant to section 245k of INA, an employment-based applicant and their family can file for an AOS (I-485) if they have been out of status or have worked without authorization for less than 180 days. The protection period is counted since the date of your most recent entry into USA. So if before filing I-485, you leave USA and reenter, you should have no issues. There are other ways to fix this also, but this is the most direct.
See attached USCIS Neufield Memo of 14 July 2008.

You cannot. This extension is available only to employment-based applicants.

1. EVL can be asked for at any stage of AOS/I-485 process. It is REQUIRED when you submit the 485, but thereafter it is discretionary.

2. The main reasons are that USCIS has to make sure you still have a job and the job is "same or similar" to what was described in the labor cert (or I-140 for EB1).

3. This means your application has been reviewed and adjudicated to be approvable. So, USCIS is just waiting for the visa numbers to be current.

Status, authorized period of stay and unlawful presence are three VERY important concepts in US immigration laws with far reaching implications. The nuances in these concepts are so intricate that they can trip up even my fellow-lawyers. I see issues in this all the time.

Here is a brief primier to enable you to understand the basics. This is by no means an exhaustive analysis.

Status

Quote: I just got a letter from USCIS that I need to appear for a I-485 interview. I had applied my green card under the EB-XX. To update you i had an arrest record in 2005 for a domestic violence battery case, which was later dismissed in court. Also you might be aware my wife is currently in india, and we are under separation. She will join me on (XXX date) if she agrees for marriage counseling. Under these circumstances I had some questions which I wanted answers for: Please let me know your response.