Prior rules required only laptops to be removed for separate screening. The new rules significantly expand the number of electronic devices that will need to be removed for screening and help government employees get a clearer view during X-ray screening.
TSA said the new rules have been in place in a pilot project at 10 US airports including Detroit, Los Angeles, Boston and Phoenix, and will expand to all US airports in the months ahead.
The new enhanced security rules at U.S. airports only apply at standard security lanes - not at lanes for travelers who are in "pre-check" programs.
Airlines for America, a trade group representing United Airlines, Southwest Airlines Co and American Airlines, said airlines "remain committed to working collaboratively with DHS officials to strike the appropriate balance of maintaining the efficiency of the system, while ensuring the highest levels of security are in place."
Last week, the US Homeland Security Department said 180 airlines worldwide that fly directly to US airports complied with a first phase of enhanced security measures outlined in June in the face of threats of hidden explosives in electronics.
"It is critical for TSA to constantly enhance and adjust security screening procedures to stay ahead of evolving threats and keep passengers safe," said TSA Acting Administrator Huban A. Gowadia.
The requirements unveiled in June include enhanced passenger screening at foreign airports, increased security protocols around aircraft and in passenger areas and expanded screening by sniffer dogs, and take effect in stages.
(Reporting by David Shepardson; Editing by Bernard Orr)
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)