Yep. A rule is fine but it has to have boundaries. Track has a white line, bollard as to where you cannot re enter the track. The apex needs to be marked and an exact definition of significant proportion. Is that so hard to define in todays world?
So, the outcome will be vague, teams will disagree on the signifcant portion or where the apex is, so we will still have stewards discretion, which is why we are having the issue. Id rather have a rule that wasnt ideal but it was 100% defineable