Who’s right?
You are of course.
Refer the Manager and the Committee to s.101 which specifically excludes Committee authority for matters that require a Special Resolution.
101 Functions and powers of committee
Subject to the rules of the owners corporation, a committee has all the powers and functions that are delegated to it by or under section 11.
Note Powers and functions that require a unanimous resolution, a special resolution or a resolution at a general meeting of the owners corporation cannot be delegated under section 11.