Re JFK's death

If the doctors were ready to declare Kennedy dead at 12:50 pm, why then was the official time listed as 1:00 pm?

The time of death was a fiction created to satisfy Mrs. Kennedy. According to Catholic doctrine, the last rites had to be delivered before the soul left the body. If her husband was already officially dead before Father Huber had a chance to administer the sacrament, it would not have been valid. "Father do you think the sacrament had effect," she asked Huber in the emergency room. He tried to ally her fears. "I am convinced that his soul had not left his body," he said. "This was a valid last sacrament."