The Federal Aviation Administration did away with a rule that had required an off switch for the sign even though smoking on U.S. flights ended years ago.The days of airplane cabins hazy with cigarette smoke are long gone, but a reminder of that era is still visible inside commercial jets.Smoking has been banned on commercial flights in the United States for decades, but the Federal Aviation Administration is only just updating an outdated rule to reflect that reality. Starting on Tuesday, the illuminated overhead “No Smoking” sign no longer requires an off switch.That obsolete requirement had become “time-consuming and burdensome” for airlines and airplane manufacturers to comply with, the F.A.A. said in a rule enacting the change. In February, for example, United Airlines was briefly unable to use a handful of new Airbus planes because the “No Smoking” signs on board couldn’t be shut off, causing the airline to delay a few flights. The issue was resolved after the F.A.A. granted United an exemption.Dozens of such exemptions have allowed that requirement to live on while the agency focused on more pressing matters. But the long life of the mandate also reflects how entangled smoking once was with commercial flights, which began in the 1910s.“The rise of aviation literally parallels the rise of the cigarette,” said Alan Blum, the director of the University of Alabama’s Center for the Study of Tobacco and Society.Pipes, cigars and chewing tobacco were once more popular than cigarettes, but that began to change in the early 20th century, according to Dr. Blum. During World War I, cigarettes were added to rations for American soldiers fighting abroad.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe.

Delta Air Lines is intensifying pressure on employees to get vaccinated with a series of increasingly burdensome requirements over the coming weeks and months, though it stopped short of the mandates that other airlines and businesses have put in place.In a letter to employees on Wednesday, the carrier’s chief executive, Ed Bastian, said that those who have not been vaccinated will immediately be required to wear masks indoors. Starting on Sept. 12, they will also have to take weekly coronavirus tests.On Sept. 30, unvaccinated workers will lose pay protection for employees who test positive for the virus and miss work while having to quarantine. Finally, starting on Nov. 1, any employee who remains unvaccinated will have to pay an additional $200 per month to remain on the company’s health care plan.“This surcharge will be necessary to address the financial risk the decision to not vaccinate is creating for our company,” Mr. Bastian said. “In recent weeks since the rise of the B.1.617.2 variant, all Delta employees who have been hospitalized with Covid were not fully vaccinated.”The average coronavirus-related hospitalization has cost the company about $40,000 per person, he said. Like many large employers, Delta insures its own work force, meaning it pays health costs directly and hires insurance companies to manage its plans.The onerous requirements apply to a shrinking share of the airline’s work force, with 75 percent of employees now vaccinated, Mr. Bastian said.“We’ve always known that vaccinations are the most effective tool to keep our people safe and healthy in the face of this global health crisis,” he said. “That’s why we’re taking additional, robust actions to increase our vaccination rate.”Delta, which is based in Atlanta, its biggest hub, operates the largest vaccination site in Georgia out of its flight museum, Mr. Bastian said. More than 115,000 doses have been administered to state residents there and more than 150,000 doses have been given to employees, their family and friends.About 50.5 percent of Georgia’s adult population is fully vaccinated, according to data from the Centers for Disease Control and Prevention, which puts the state near the bottom of the country.The airline’s approach differs from that of some competitors. Earlier this month, for example, United Airlines announced that it would require vaccines across the board. That mandate will take effect on Sept. 27. United employees who provide proof of vaccination by Sept. 20 will receive a full day’s pay. Frontier Airlines, a smaller carrier, said it would require vaccination by Oct. 1.