High Pressure Aluminum Gas Cylinders | Composite Cylinders - DOT Notice of Enforcement Discretion Regarding Cylinders that have Exceeded their Periodic Requalification Test Date Aluminum Cylinders | Composite Cylinders | Impact Extrusions
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I just stumbled across this while looking up some spec's on Catalina cylinders. It appears to state that the feds are deciding not to harass people for filling tanks that are up to 1 year out of hydro. I'm not sure how many dive shops will give you a pass on that, but it seems that maybe the feds will, at least for now.
Of course, it's the government, so the policy may change on short notice.