NASCAR kicked out a technical bulletin just now on the new rules focusing on racing 100% of of the team and driver's ability. Here's the high-level ...
"NASCAR requires its competitors to race at 100% of their ability with the goal of achieving their best possible finishing position in the event." Any competitor who is ruled by NASCAR to have taken action aimed at "artificially altering" the outcome of the event is subject to being put in a world of hurt by NASCAR.
- Contact while racing for position
- Performance issues
- Tire management
- Fuel management
- Yielding to a faster car
- Alternative pit strategy (i.e. short pit)
- Long fuel strategy to lap competitors
- Laying over or "lay over for one, lay over for all."
Examples of Unacceptable Activities:
- Offering a position in exchange for favor or material benefit
- Offering material benefit in exchange for track position
- Directing a driver to give up a position to the benefit of another driver
- Intentionally causing a caution
- Causing a caution for the benefit of or detriment of another driver
- Intentionally wrecking a competitor
- Intentionally pitting/pulling into garage to gain advantage for another competitor
- One spotter per team on the spotter stand
- Two analog radios per spotter
- Fan View and scanners are acceptable
- NO digital scanners (that can be encrypted) on the spotter stand
- Video cameras will be installed on spotter stand and monitored by NASCAR race control
Sounds like the key is 100% of their ability with the goal of achieving their best possible finishing position in the event. So that would mean start-and-parks are not illegal because the team lacks the ability (through under funding or other reasons) to do any better.
Also, using pit/fuel/tire strategy -- which involves going less than 100% of maximum speed -- appears to be cool, because of the "with the goal of achieving their best possible finishing position in the event." The reason cars do fuel strategy is to slow it down (go less than 100% of max speed) is because it will help them finish higher than they would if they went at 100% constantly. So that's OK.
No intentionally wrecking a competitor seems like a HUGE change, because in the past drivers could do that and say "Yeah, I wrecked him" and and have no penalty. Remember "boys have at it?"
Judging intent will be the biggest challenge for NASCAR. Was the move made to benefit a teammate or harm an opposing team? Good question. Good luck to NASCAR in figuring that out.
For a transcript of the press conference that announced these changes, go here.