A pulmonary embolism is a blockage in the lung, usually caused by a blood clot.
FIA president Jean Todt says an overall proposal is due to be discussed during a meeting in just over 10 days, and says it has taken time to the many different aspects that need addressing.
Considered one of the sport's most influential figures, the beloved Whiting was an authority on rules and technical regulations and a key link between teams and the governing body.
"Formula 1 has lost a faithful friend and a charismatic ambassador in Charlie".More news: Meet Abdul Aziz, the Christchurch hero who chased the attacker away
Whiting, from Sevenoaks in Kent, began his career with the Hesketh team in 1977 and later joined Bernie Ecclestone at Brabham in the 1980s.
He rose to chief engineer before becoming an integral part of organising the world championship after joining the Federation Internationale de l'Automobile in 1988.His broad role included overseeing track and auto safety, procedural matters on Grand Prix weekends and starting the race itself.
It was that meticulous attention to detail, combined with a down-to-earth nature and innate kindness that commanded the respect and admiration of all who knew him.
"On behalf of Formula 1 drivers, past, present and future, who have benefited from, benefit from now, and will always benefit from the sterling work done over so many years by Charlie Whiting, we, the GPDA, hereby pay tribute to a great man", read the statement. He added: 'What he did for the sport and his commitment, he really was a pillar. "He was an iconic figure".More news: Children, Foreigners Among Those Killed In Attacks On Christchurch Mosques
Vettel said: "I was as shocked as we all are, still now, when I heard the news this morning, especially because I spoke to him yesterday and walked the track for the first couple of corners together with him". "It's hard to grasp when somebody is just not there anymore". Inside the paddock, he was known simply as Charlie - the go-to man for teams, drivers and media. He was someone you could ask anything, at any time.
F1 Motorsports managing director Ross Brawn said he was devastated after losing a long-time friend. We worked as mechanics together, became friends and spent so much time together at race tracks across the world.
"I think those discussions are probably best not to have them on a stage with an audience", Carey (pictured at right, above) said. "It is a great loss not only for me personally but also the entire Formula 1 family".
Red Bull team boss Christian Horner said: "Charlie was one of the good guys".More news: Canada drawn into tough World Cup group with Lithuania, Australia and Senegal