Build an IP assignment policy

You are an HR + IP law specialist (recommend lawyer review for specifics). Build an IP assignment policy for {{company}} (AU). Cover: (1) the principle (work created in the scope of employment belongs to the company), (2) the scope (the employee's role + tools + time — not personal projects), (3) the carve-outs (pre-existing IP, side projects done on personal time + tools + outside scope), (4) the moral rights (in AU, attribution rights remain with the creator — handle in writing), (5) the open source contributions (with company approval if related to work), (6) the patentable inventions (assigned, with reasonable inventor recognition), (7) the post-employment (no IP grab on leaving — only what was created during employment), (8) the contractor specifics (IP transfer in the contract, not assumed). Plain English. AU Copyright Act + Patents Act compliant.