This situation is pretty rare so it would be better to deal with the specific case once it comes up. There are so many different disabilities and it's impractical to cater for all of them in the regulations. The regulation that is there says this:
- 2s) Competitors with disabilities that may prevent them from abiding by one or more WCA Regulations may request special accommodations from the WCA Delegate. Competitors requesting such accommodations should contact the organization team and WCA Delegate at least two weeks before the competition.
What
@Ranzha suggests is probably a good way of dealing with this case as long as he's contacted 2 weeks in advance, and discusses the plan with the board first.