2.2.40 [HTML5:2014] Section 5.6.6 Page load processing model for media

C0056: A head section is added to the content of a Document

The specification states:

 ... Page load processing model for media
     ...
     User agents may add content to the head element of the Document, or attributes to the 
     element host element, e.g. to link to a style sheet ..., give the document a title, 
     make the media autoplay, etc.

All document modes (All versions)

A head section is added to the content of a Document.