Rules updated Sept. 29, 2009:
Section 3:
"The GT1 class consists of the GTR class, with the FZR restricted by 35kg to achieve proper balance with the XRR.
The GT2 class consists of the GTR class, with the following intake restrictions: FZR 20%, FXR 23%, XRR 25%."
Section 5:
Changed formatting of the example names to show actual color.
Section 6, first line:
"Teams must produce a distinct car skin for each round of the season. If a team has a car in each class, these cars should be distinct in appearance from one another."
Section 6, next to last line:
"The Masters of Endurance series logo and the appropriate race logo must also be included, each large enough to be visible from track cameras. Skins must be posted in the appropriate round’s skin thread 24 hours prior to the first qualifying session of a given race weekend. Skins should be posted at 2048x2048 pixel resolution."
Section 7.1, moved 4th line to be a part of the second line, like so:
"Each car may run an unlimited amount of laps during these sessions, but may only have one driver on the track at all times. Multiple drivers may be used per car per session, and the fastest lap from the entire team over both sessions will count toward their starting position (barring any penalties)."
Section 7.2.1, second line:
"Races will begin with a rolling start including one formation lap behind a safety car, except in the case of South City Long, where the polesitting GT1 car will act as the safety car."
Section 7.2.3, last line:
"After finishing, drivers should continue around the track on a cool-down lap before returning to the pit lane and parking in a garage stall. The podium finishers in each class should report to the start/finish line for a podium photo."
Section 8, new third line:
"A car must finish the race in order to be awarded points."
Section 9.1, last line:
"Incidents involving gross negligence or misbehavior between car classes may result in more severe punishments, including loss of points, loss of laps, or disqualification, at the admins’ discretion."
Section 9.3, last line:
"Use of an inappropriate skin (wrong round logo, missing logos, wrong number, etc) or lack of a skin will result in a loss of fastest session lap in qualifying, or a DT penalty in the race."
Section 9.4, last line:
"Protests must include a replay of the incident, preferably cut to show the lead-up to and aftermath of the incident."
Section 9.5.2, added line at the end:
"• Use of inappropriate skin in race"