As security threats at major airports loom large, the Centre has decided to make more stringent the vetting of workers that have access to sensitive areas. According to sources, the recent missive by security agencies has flagged the concerns with a directive to make changes in hiring processes and screening of contractual workers at the airports. “Workers, who are on the rolls of airlines or ground handling agencies, should be given access to sensitive areas only after proper security vetting. Some of them are given pass for seven days or 90 days; even in those cases, the vetting process must examine the worker’s antecedents,” said the sources. The concern on security vetting has also been raised by the National Security Advisor (NSA), Ajit Doval. The Sunday Standard reviewed the letter, which categorically asked the airports to rectify security breach. “Commercial interests often impel them to employ low cost workers without caring for verification and antecedents. Though not security vetted, they have access to sensitive areas of the airports,” the letter said.