Companies seeking H-1B workers are being asked to prove they’ll have definite assignments for the full three-year term of the visa, the latest hurdle from the administration in its crackdown on the specialty occupation visa program. U.S. Citizenship and Immigration Services requests for statements of work, vendor agreements, and a list of projects “have become really standard with third-party placement situations and staffing companies,” said Jennifer Minear of Richmond, Va.-based McCandlis