Only two people have access to the test logs that would determine just how many non-Schutt helmets more than 10 years old are being recertified and used in which areas of the country: Naera’s Mr. Fisher and Nocsae’s Mr. Halstead. They provided data to The New York Times that indicated that the number is minuscule.

Mr. Oliver, Nocsae’s executive director, said he does not receive or consult reconditioning data. Asked if helmets more than 10 years old should be worn by a child, he said: “I can’t say it should or shouldn’t be. All I can go on is how it tests on the standard.”

The Future

Most experts agree that regarding concussions and growing evidence of their health risks  particularly among young athletes  the first order of business is to get players, coaches and parents to recognize the injury and then keep the player away from sports for as long as it takes to heal. Others added that football leagues and referees must more vigilantly penalize players who lead with their head while tackling. This dangerous maneuver received heightened news media coverage this week given several high-profile injuries, but it occurs in almost every game at every level.

The Wild West culture regarding helmets must also change, they said. Some call for Nocsae and Naera to set stronger standards and more proactively enforce their rules, but that would almost certainly require greater legal protection, said Dr. Cantu, the Nocsae vice president. Mr. Ferrara, the president of Xenith, called for the industry to receive governmental oversight.

“I want to answer to a higher authority than Nocsae,” Mr. Ferrara said. “I want to answer to the F.D.A.”

After four years of national debate over sport-related concussions as a public-health concern, and after several officials were interviewed for this article, Nocsae decided earlier this month to consider moving on the matter of a concussion-related helmet standard. Strongly pressured by Dr. Cantu, Mr. Oliver scheduled a meeting for Saturday to have experts in the field discuss possible adjustments  specifically a test for the less violent forces believed to raise concussion risks. Even if adjustments begin that day, the process will take at least three or four years.

Meanwhile, and pending more effective industry oversight, young football players will continue to wear helmets whose limitations are obscured by their communities’ love for football. Nowhere was this more clear than here in Norman last August, when fifth-graders lined up to receive their headgear for the season. No one thought to question what helmets are designed to do, how old the helmets were, if and when they had been reconditioned, or whether their sweat-stained and dirty padding retained its safety properties.