The reentry permit is to be filed in the US? I am copying from the email sent to me from the Mumbai consulate where I think the import is that I can apply for her in Mumbai itself....
"LPR - SB-1 RETURNING RESIDENT VISA
A legal permanent resident who remains outside the U.S. for over one year without a valid reentry permit has jeopardized his/her legal resident status. If such a person wishes to return to the U.S. as a legal resident, two options exist: obtain a new immigrant visa petition or file an application for a Returning Resident (SB-1) visa. In order to apply for an SB-1 visa, the applicant must come to the consulate in person any business day at 7:30 a.m. and bring the following documents:
a valid passport, his/her green card, completed forms DS-117 (available at
http://mumbai.usconsulate.gov/lpr_forms.html) and DS-156 (available at
http://mumbai.usconsulate.gov/ivforms.html), one passport-sized photograph, and a bank draft for $400 or Rs.20,000/- in favor of American Consulate General, Mumbai. The applicant must also provide evidence that he/she departed the United States with the intention of returning to an unrelinquished residence and that his/her stay abroad was for reasons beyond his/her control and for which he/she was not responsible. There is no guarantee the application will be approved, and no refunds are available for denied applications. If the application is approved, the applicant will then be scheduled for a second appointment after assembling the regular documentation required of all immigrant visa applicants, such as a medical exam and police certificates. This second appointment will likely be scheduled after two to three months.
When you arrive at our office at 7:30 a.m. to make your initial application, please join the line for pending immigrant visa cases and present this e-mail to the employee outside. Please note that completing the process may require several hours depending on conditions, and you will not be allowed to enter the consulate with any of the prohibited items described on our website at http://mumbai.usconsulate.gov/requirements_for_visitors.html."
I think a reentry permit and an SB-1 talked about above are different things. This is the one I want to apply for. The travelling with an infant, even in Business class, is a killer.