NZS 6116 2.1.2 Isolating Transformers and earth reference

[JamieP]

"Electrode circuits for Class A, B and C stunning and stimulating equipment not protected
by barriers shall be supplied from an isolating class transformer complying with
AS/NZS 61558.2.4 with no direct earth reference unless specifically allowed in section 3."

I can't see any allowance in section 3 for an earth reference? Is this another mistake of this standard?

So if no barriers, isolating transformer must be used and have no earth reference. Has anyone else seen anything in section 3 to back up the above comment? Are there situations in section 3 that allow earth reference?

[AlecK]

The only thing in Section 3 that can arguably be said to specifically allow an earth reference is 3.4.2; metalwork used as electrode.