So we have two references one says Spinning is "Prohibited" presented by Crummp (highlighted with red box to support his Spitfire stability impediment argument), and here another reference saying Spinning is Ok with authorisation from a pilot's CO or CFI in an OTU. i.e. in this reference its NOT prohibited.
What do you mean where is the rest of it ? .... its sitting on my desk as a written publication
If you want the entire page from which the snippet was taken from here you are:
