So I 'shall be allowed'.... (but I shall not have to).
Isolated from as many mechanical connections as possible, is about as 'isolated' as a ground CAN be, until it fails. Cause ground is ground, until it isn't.
That's why I said 'pretty clear', and not 'clear'
Since I'm 'allowed' to now..... I think it would be better to use a standard receptacle and a separate physical bond wire extended back to the panel. This would ensure that if there was a mechanical ground failure (emt come loose etc), the separate bond wire would become the least resistive path to ground.
With an isolated ground receptacle and a failed mechanical ground, the potential differece imposed between the now open ground on the yoke, and the solid grounded bond wire, could be more
harmful to equipment.
I can't find Isolated ground anywhere else in the code but what I posted.... and that language (once pointed out to me) is pretty obvious.