The ACT in Qld says the property is required to be kept in good repair. Signage in good repair fits under this. The current Building Managers Code current best practice guide says if it’s worth doing, it’s worth doing within a month. 6 months is too long on either point above so your polite pressure is worth applying. Maybe a quick recap note in nice language reiterating your request, and with reasons why it is warranted will remind them again and create a paper trail. If you have some friends in the building codjule them into asking of the same thing to help make it sound like others are also interested in seeing this done and that it is not just you.