first paragraph about adopting constructed stylesheets should be clearer

[dbaron]

The section on Using Constructed Stylesheets currently begins with the paragraph:

A CSSStyleSheet can only be applied to the Document it is constructed on (e.g. the document on which the factory function is called on), and any ShadowRoot in the Document it is constructed on, by assigning an array containing the sheet to their adoptedStyleSheets. So, a stylesheet can be used in multiple DocumentOrShadowRoots within the document it is constructed on.

This paragraph appears to be a sequence of statements of facts (see Hixie's post). In other words, it doesn't have any normative requirements. But it also doesn't cite any references for those statements of facts, which makes me suspect that it might be intending to impose normative requirements.

I think this should be reworded to either (a) more clearly impose the normative requirements that it intends or (b) cite sources (i.e., other specifications) for its statements of facts.