It is my hope that the FAA will work, with the FCC and other federal agencies where appropriate, as expeditiously as possible to implement common sense changes to today's restrictive regulations on in-flight use of PEDs that better reflect new technologies and the changing role these devices play in Americans' daily lives. While the agency can and should use existing authorities to allow for the broader use of PEDs, I am prepared to pursue legislative solutions should progress be made too slowly.

In October, after months of pressure from the public and the news media, the F.A.A. finally said it would begin a review of its policies on electronic devices in all phases of flight, including takeoff and landing. But the agency does not have a set time frame for announcing its findings.

An F.A.A. spokeswoman told me last week that the agency was preparing to move to the next phase of its work in this area, and would appoint members to a rule-making committee that will begin meeting in January.

A year ago, when I first asked Les Dorr, a spokesman for the F.A.A., why the rule existed, he said the agency was being cautious because there was no proof that device use was completely safe. He also said it was because passengers needed to pay attention during takeoff.

When I asked why I can read a printed book but not a digital one, the agency changed its reasoning. I was told by another F.A.A. representative that it was because an iPad or Kindle could put out enough electromagnetic emissions to disrupt the flight.

Yet a few weeks later, the F.A.A. proudly announced that pilots could now use iPads in the cockpit instead of paper flight manuals.

The F.A.A. then told me that “two iPads are very different than 200.”

“Electromagnetic energy doesn’t add up like that. Five Kindles will not put off five times the energy that one Kindle would,” explained Kevin Bothmann, EMT Labs testing manager. “If it added up like that, people wouldn’t be able to go into offices, where there are dozens of computers, without wearing protective gear.”

Bill Ruck, principal engineer at CSI Telecommunications, a firm that does radio communications engineering, added: “Saying that 100 devices is 100 times worse is factually incorrect. Noise from these devices increases less and less as you add more.”

In September, a passenger was arrested in El Paso after refusing to turn off his cellphone as the plane was landing. In October, a man in Chicago was arrested because he used his iPad during takeoff. In November, half a dozen police cars raced across the tarmac at La Guardia Airport in New York, surrounding a plane as if there were a terrorist on board. They arrested a 30-year-old man who had also refused to turn off his phone while on the runway.

In 2010, a 68-year-old man punched a teenager because he didn’t turn off his phone. Lt. Kent Lipple of the Boise Police Department in Idaho, who arrested the puncher, said the man “felt he was protecting the entire plane and its occupants.”

Abby Lunardini, vice president of corporate communications at Virgin America, explained that the current guidelines require that an airline must test each version of a single device before it can be approved by the F.A.A. For example, if the airline wanted to get approval for the iPad, it would have to test the first iPad, iPad 2 and the new iPad, each on a separate flight, with no passengers on the plane.

It would have to do the same for every version of the Kindle. It would have to do it for every different model of plane in its fleet. And American, JetBlue, United, Air Wisconsin, etc., would have to do the same thing. (No wonder the F.A.A. is keeping smartphones off the table since there are easily several hundred different models on the market.)

Ms. Lunardini added that Virgin America would like to perform these tests, but the current guidelines make it “prohibitively expensive, especially for an airline with a relatively small fleet that is always in the air on commercial flights like ours.”