I appreciate that by default the relevant sections of the Data Privacy Act mean that there is no requirement for Body Corporate Committee to provide an email address(es) for Owners to be able to contact them.
The Data Privacy Act? There are Federal and State laws but none of them have that name.
There certainly IS a requirement for Strata Schemes to register the addresses and contact details of all owners. There is also a requirement for anyone who is elected to the committee to be identified in various ways.
Section 178 of the Strata Schemes Management Act (NSW) says this:
(1) Information about lots
The following information must be recorded in the strata roll in relation to a particular lot in the strata scheme—
(c) an Australian postal address, and an email address if the holder has one, if not provided as the address for service.
If the email address is on the strata roll, it must be available to all owners on request. If the apartment owner has one, then it should be on the roll. Privacy laws in NSW do not apply to corporations with a turnover of less that $3m a year.