each team MUST nominate a 3rd/reserve driver
each team must have its 3rd driver at each race
3rd driver must take part in every 1st practice session - unless it's a new track
regular drivers must alternate giving up their seat for 3rd driver in 1st practice
If a regular driver is unable to take part in qually/race, it MUST be the teams nominated 3rd driver who takes is place.
Teams will not be allowed to swap 3rd drivers with any other driver.
If we had those rules in place, teams would have to use a 3rd driver and we wouldn't have the Lotus situation now