Cycling's governing body has announced new legislation to bar riders who have failed a drugs test from working in the sport after they finish racing.
The International Cycling Union (UCI) has ruled that anyone failing a test from 1 July will not be allowed to work in any back-room capacity.
However, the ban will not be applied retroactively to past riders.
That means Bjarne Riis, who admitted doping when he won the 1996 Tour de France, can continue as a team boss.
A UCI statement said: "We aim to prevent anyone found guilty of infringing the regulations during his cycling career from obtaining a licence."
Saxo Bank-SunGard manager Riis is not the only rider with a drugs history currently involved at the highest level in the sport - Kim Andersen, who tested positive three times, is a sports director at Andy Schleck's Leopard-Trek team.
The new regulations do allow banned riders to join a team after a five-year absence if they committed only one doping offence that was not sanctioned by a two or more year ban.
The new rule applies to any rider who wishes to join a team as "a general manager, team manager, coach, doctor, paramedical assistant, mechanic, driver or other function as specified on the licence".