pic: (447) Is this legal?

[Ricky Q.]

Don't think so:

Q&A #1407
Q:Question ID 1179 did not answer the question. After much discussions there has not been a concensus as to whether 1/4" coiled hose can be used for expansion reasons? We would like to see a yes or no answer please.
A:No. It does not pass the 2005 Part Use Flowchart for a fitting or a valve.

But this is allowed:
Q&A ID#1616
Q:Can we coil the provided hose for the pneumatic system our selves?
A:Yes.

And that is what we did...