2.1.308 Part 4 Section 2.11.14, footnoteReference (Footnote Reference)
For additional notes that apply to this portion of the standard, please see the notes for endnoteReference, §2.11.7(a).
a. The standard states that footnote references can appear in headers, footers, comments, and textboxes.
Word does not allow footnote references in headers, footers, comments, or textboxes.