You are mis reading the document. Old Spice had none slip tube surfaces made from Hyperlon. Even when wet they provided a great none slip surface.
However if it was a yellow Tornado with those slippery PVC tubes then you would be right to worry
When you are reading MGN 280 do look up the deffinitions of inflatable and rib. There is a difference in parts of the coding.
You read 140 pages of MGN 280 on Saturday night, hmm nightlife must be exciting in Norf Wales
Pete