Adjustment of Status

Approval of AOS (Form I-485) means she is now a green card holder as of the date of the approval. The only thing she needs is the proof of that fact. You can take the approval notice, make an infopass appointment and ask that her passport be stamped with evidence that her green card has been approved. That stamp is as good as a green card. She can travel using that.

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.

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.
 

Quote: 1. Hello Rajiv, my wife and I have been working on H1B for different employers. My employer applied for my GC in 07. I have my I-140 approved, my wife and I have our EAD cards and AP. Thanks to your team! Now my wife's H1B term (6 years) ends on Jan 2010. Does this mean that if she wishes to continue her employment with the same employer after Jan 2010, she "HAS" to use her EAD ?

Ans. Yes. Under the current USCIS policy, they will not extend her H-1, based upon your I-140. They used to do that a few years ago, but not any more, as far as I know.
 

Correct. "Unavailable" means that it is the ESTIMATE of the State Department that visa numbers for India are exhausted for this fiscal year which ends on September 30. But the estimate may not always be accurate. DOS may go back and reopen this category if they need to (unlikely, but not impossible). Your green card can go on in your absence. That is no problem as long as we have answers to these questions: 1. Is the job really permanent? 2. Why is the employer accommodating you? 3. Who is performing the job in your absence?