According to JDSupra, USCIS has released an E-Verify Quick Reference Guide For Airport Operators.
Under the Federal Aviation Administration Extension, Safety and Security Act of 2016, Pub. L. No. 114-190, airport operators can now apply to have direct access to use E-Verify to determine the employment authorization for individuals seeking unescorted access to an airport’s Security Identification Display Area (SIDA) as a component of their badging application process.
JDSupra writes that “USCIS guidance around E-Verify use for airport operators is still developing. E-Verify use has historically been limited to employers confirming identity and employment authorization for new hires as part of the Form I-9 process (and, with some limited exceptions for federal contractors, current employees).”
JDSupra also notes that this could be the beginning of a significant expansion of E-Verify through laws permitting E-Verify use where there is a perceived security benefit to confirming employment authorization.
You can download and print a copy of the manual here: E-Verify Quick Reference Guide For Airport Operators.