" Providing employment and travel authorization to those with approved employment-based petitions awaiting visa availability, so they have similar protections t

" Providing employment and travel authorization to those with approved employment-based petitions awaiting visa availability, so they have similar protections to those provided portability under the American Competitiveness in the 21st Century Act " What exactly does this mean? Can people with approved petitions move freely between employers without redoing a labor cert?