1. The job title and job description are different things. As for the location, that depends on the PERM. If there is a complete change in the job description and job title it is still ok if you intend to come back to the old title once the green card is approved. See how the location, the title and job description is for the future job.
2. Yes of course. This kind of language we put all the time in the PERM application. More...
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