The Federal Aviation Administration has published new rules that it calls “the final piece of the puzzle” toward allowing half-helicopter, half-airplane, electric “air taxis” to start whizzing through the skies.

Powered lift includes aircraft described by industry watchers as electric vertical takeoff and landing, or eVTOL. Using tilt rotors, eVTOL aircraft are designed to take off and land vertically like a helicopter and then transition into forward flight on fixed wings like a plane.

Federal regulators gave a strong push to electric-powered air taxis Tuesday by issuing a final rule for operating the aircraft and how pilots will be trained to fly them.The head of the Federal Aviation Administration,