I have found the following information on murthy faq...I thought it could be useful for our colleagues
Question: I am a software contractor working with company X. I am working in Connecticut for a client. I applied for my labor. Before the labor is cleared, I move to a project with a different client outside Connecticut. Do I have to apply for a labor again (my company is still X)?
Answer: As long as the labor is filed using the company"s HQ address and not the temporary work site, then it is fine. The Department of Labor normally expects a person to only file the PERM or LC where the work is performed. The problem is that, with "roving" employees whose work locations keep changing, the HQ rule applies for the filing place for the LC and I-140, etc. This rule was set up after the technology boom of the 1990s, but the burden is on the employer to show that it is a roving employee position and the company is actually headquartered where the PERM or LC is filed or it is the business"s corporate HQ. Nov-21-2005.
Question: I am a software contractor working with company X. I am working in Connecticut for a client. I applied for my labor. Before the labor is cleared, I move to a project with a different client outside Connecticut. Do I have to apply for a labor again (my company is still X)?
Answer: As long as the labor is filed using the company"s HQ address and not the temporary work site, then it is fine. The Department of Labor normally expects a person to only file the PERM or LC where the work is performed. The problem is that, with "roving" employees whose work locations keep changing, the HQ rule applies for the filing place for the LC and I-140, etc. This rule was set up after the technology boom of the 1990s, but the burden is on the employer to show that it is a roving employee position and the company is actually headquartered where the PERM or LC is filed or it is the business"s corporate HQ. Nov-21-2005.