Of the various documents that govern Grand Prix racing, the FIA Sporting Regulations are perhaps the most interesting, for they determine how the race weekend is run. Each of the 11 team managers needs to know them off by heart, as they are the guys who have to deal with FIA officials and they are the guys that other team members turn to when something unexpected happens.
Every winter there are subtle changes and modifications, overseen by Charlie Whiting, to which the team managers have to adjust. They are able to participate in the process to some degree, since through a series of meetings with FIA officials - the last was in Monaco in early February - any apparent anomalies can be discussed and adjusted if necessary.
This time around the team managers have a more difficult task than usual for the simple reason that the whole document has been re-indexed, if that's the right word, so rules that have been set in stone for years now have a totally new numbering system. It's actually handier, because before whole reams of rules came under one article heading, while now individual paragraphs have their own classification; Art 38.14b part 1 explains the delayed start procedure, for example.