Are proxies allowed at strata committee meetings

Am I correct to think that:

a) there is no legal provision for proxies to be given to SC members to be used at a SC meeting;

b) there is provision for appointment of acting members to the SC, which can include existing SC members;

c) even if an existing SC member has an appointment as an acting member, that cannot be used to make up the numbers to form a quorum for an SC meeting?

For example, if the number of SC members was approved to be nine at the last AGM and only four were present at a meeting would there be a quorum if three of those in attendance had acting member appointments from absent members?