Sure, day before the race sounds good, like a combat sports weigh in. I'd also imagine some regularly scheduled points throughout the season. Enforcement need not involve a ban, just can't compete until you get back up to 5% or whatever. They have mobile dexa scans in vans in my area, and they're actually cheaper than blood tests. I don't think the biggest hurdle would be in the implementation details, but in convincing traditionalists that there's even a problem to be addressed.So we are talking regular dexa scans and some arbitrary number as a max body fat? When is this scan performed? The day before the race? This sounds ridiculous.
Pushing the boundaries have always been fundamental to the sport and nutrition is just part of that.
As to pushing the boundaries: is that an argument for not having any rules at all? Every rule in the book defines some line that cannot be crossed. Is the sport improved if we let them push the boundary of socks and suddenly everyone has lycra tubes up to their knees, or the true boundary of HPV performance and everyone's in an enclosed recumbent?