It appears H1-Bs somehow get around that, or maybe Tata gives them the relo for the huge mark up they get, while the wage provided is well under the going rate.
The Fortune 50 firm my project is with is hiring any competent person they can find... and a few not so competent. They hire local, mostly they draw from the Rust Belt, which does not have the economy of TN, NC, GA, FL, TX. And they hire non-citizens. They hire employees. They bring in contractors. Whatever flavor an applicant wishes to come through.