3 or 5 yr Hydro?

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Ok..I have a 68/4500 Java(Carleton) tank and on the label it says:

"Retest every 5 years per US DOT CFFC & E11194" and
"Retest every 3 years per TC-SU 5303"

The tank has both of those codes on it, the label reads:

DOT-E11194 4500PSI M4927

TC-SU5303 310 BAR

6151-71135 REE 01-CL-02

15.4cc

So is it a % or 3 year hydro tank?

Im tired and confused right now, and plan on playing saturday. So if any one could help me out, it would be greatly appreciated.