It is more likely than not that strata letterboxes are common property and are the responsibility of the owners corporation to properly maintain and keep in a state of good and serviceable repair.
Transferring funds from capital works fund to the admin fund is possible but with a caveat. It would be a loan and would need to be re-pay within 3 months.
Who lives in an apartment in NT? NT Strata Data & Statistics – May 2018 The first comprehensive national report of the strata and community title sector reveals there
Who lives in an apartment in ACT? ACT Strata Data & Statistics – May 2018 The first comprehensive national report of the strata and community title sector reveals there
Who lives in an apartment in QLD? QLD Strata Data & Statistics – May 2018 The first comprehensive national report of the strata and community title sector reveals there
Who lives in an apartment in VIC? VIC Strata Data & Statistics – May 2018 The first comprehensive national report of the strata and community title sector reveals there
Who lives in an apartment in NSW? NSW Strata Data & Statistics – May 2018 The first comprehensive national report of the strata and community title sector reveals there