ANDI also requires O2 cleaning for any mixtures above 23.5%.
What is SafeAir?
So does Luxfer:
"..., the main thing to remember concerning Luxfer scuba cylinders is that when you fill a cylinder with an oxygen concentration of 23.5% or more, that cylinder must be specially cleaned for oxygen service as though it contained 100% oxygen."
and the US navy, NASA and the CGA.
Its amazing how much misinformation exists about EANx, and filling and handling cylinders. The biggest is the so called 40% 'rule' that doesn't actually exist.
Heres another from interesting fact from Catalina: that most fill station operators are unaware of
"The U.S DOT has interpreted its regulations stating that DOT-3AL (aluminum) SCUBA cannot be charged with oxygen enriched air to a service pressure greater than 3000psi. Thus, Catalina Cylinders 3300psi compact SCUBA cylinders cannot be charged with oxygen enriched air as mandated by the DOT."