@kapnk006 - below are the rules from the sports car racing series NASA. These are very clearly written rules and say exactly what you are describing. Your front wheel equal to the driver's position and he has to give you room. Room is defined by 2/3s of a car width, which mean that the overtaking driver may need to put two wheels into the grass to execute the pass. The SCCA rules are way less clear.
NASA overtaking rules:
25.4 Rules For Overtaking (page 103)
25.4.1 Passing General
The responsibility for the decision to pass another car, and to do it safely, rests with the overtaking driver. The overtaken driver should be aware that he/she is being passed and must not impede the pass by blocking. A driver who does not watch his/her mirrors or who appears to be blocking another car seeking a pass may be black-flagged and/or penalized. The act of passing is initiated when the trailing cars (Car A) front bumper overlaps with the lead cars (Car rear bumper. The act of passing is complete when Car As rear bumper is ahead of Car Bs front bumper. NO PASSING means a pass cannot even be initiated. Any overlap in a NO PASSING area is considered illegal.
25.4.2 Punting
The term punting is defined as nose to tail (or side-of-the-nose to side-of-the-tail) contact, where the leading car is significantly knocked off of the racing line. Once the trailing car has its front wheel next to the driver of the other vehicle, it is considered that the trailing car has a right to be there. And, that the leading driver must leave the trailing driver enough racing room. In most cases, racing room is defined as at least three quarters of one car width. If adequate racing room is left for the trailing car, and there is incidental contact made between the cars, the contact will be considered side-to-side. In most cases, incidental side-to-side contact is considered to be just a racing incident. If, in the case of side-to-side contact, one of the two cars leaves the racing surface (involuntarily) then it may still be considered a racing incident.
Note: See specific class rules for variations in this rule.
25.4.3 Right to the Line
The driver in front has the right to choose any line, so long as not to be considered blocking. The driver attempting to make a pass shall have the right to the line when their front wheel is next to the driver of the other vehicle. Note: This rule may be superseded by class specific rules.
25.4.4 Blocking
A driver may choose to protect his or her line so long as it is not considered blocking. Blocking is defined as two (2) consecutive line changes to protect his/her line, and in doing so, impedes the vehicle that is trying to pass with each of the two (2) consecutive movements. Drivers are encouraged to check with the Race Director for a full explanation before the start of the race.
25.4.5 Incident Review Board
The Race Director may assemble an Incident Review Board (IRB) for the purposes of investigating on-track incidences. The Race Director may give the IRB the power to make decisions to determine fault and/or issue penalties. All decisions made by the IRB may be appealed to the Race Director. The Race Director may elect to override the IRB decisions and/or modify penalties.
http://www.nasaprora...m/rules/ccr.pdf