Effective April 1, there will be new rules governing the H-1B visa, which U.S. tech companies use to hire skilled workers from overseas. U.S. Citizenship and Immigration Services announced the new rules Wednesday. Starting April 1, USCIS will select H-1B applicants from one pool. In the past, they were separated into the regular application group and applicants with advanced degrees applying for an exception to the cap of visas awarded each year.