Unicode 10.0 Legitimacy of 0031 FE0E 20E3

[Richard Wordingham]

Where in the draft databases for Unicode 10.0 is Unicode 9.0 variation
sequence <U+0031, U+FE0E> declared legitimate?  Without such a
declaration, a font that had a special glyph for <U+0031, U+FE0E> or
a substitution specific to <U+0031, U+FE0E, U+20E3 COMBINING ENCLOSING
KEYCAP> would not be Unicode compliant.

I hope this reflects my ignorance of the definition system rather than
an error in the databases.

Richard.