OK, my bad, I worded it wrong. Did it quick at work.
The intention of this rule is to stop people mounting lipos on the wing, top deck, outside of the shell etc.....
As long it is in the position intended, that is fine.
This rule actually slows down our battery changes anyway fellas
EDIT: Just so everyone knows this rule clarification came from Derek after I asked him about how we were going to mount our cells on Saturday night.
G