The proposed regulation will be posted on a Federal Register website later today, said David Castelveter, an agency spokesman. The TSA isn’t proposing any change to its screening procedures, he said.

The move comes almost three years after the TSA awarded a $47.9 million contract to L-3 Communications Holdings Inc. (LLL) and OSI Systems Inc. (OSIS)’s Rapiscan unit to develop full-body scanners, known as advanced-imaging technology.

A U.S. appeals court in 2011 ordered the rulemaking as the result of a lawsuit filed by the Electronic Privacy Information Center, a civil liberties group. The group unsuccessfully sought to suspend the body-scanner program as a violation of the Fourth Amendment.