The EPBC Act is the law to check when a project could affect nationally protected environmental matters. It is less about ordinary office admin and more about project decisions: where the site is, what work is proposed, what species or heritage values may be nearby, and whether the impact could be significant.
For a business owner, the commercial risk is timing. If a project needs referral or approval, starting work, signing unconditional contracts or promising delivery dates too early can create legal and cash-flow pressure.