If it was up to me I would allow it any place where there is no real time to gain, where the grass creates a natural limit right outside the white line. The reason for this is that people do it anyway to a variable degree, and then it is better and more fair to allow it so that everybody push the same amount.
Anywhere it is possible to run more than marginally wide/cut I would disallow it for obvious reasons (unless the line is totally stupid like at Singapore).
Anywhere it is possible to run more than marginally wide/cut I would disallow it for obvious reasons (unless the line is totally stupid like at Singapore).