Shorten Section 8.1
Section 8.1 is poorly written and over-specified. HTTP lets every resource choose which methods to accept based on server-determined criteria.
Replace "section 8.1 creating resources with POST", first sentence
Every collection accepts POST requests to create resources - the client POSTs a representation of the desired resource to the IRI of the collection.
To add members to a collection, clients send POST requests to a collection's URI.
The status code returned for a successful creation POST MUST be 201 ("Created").
see also: PaceRemoveRegistry