Answer:
HR policies and employment agreements about IP may or may not be enforceable, depending on current law and location.
Explanation:
The HR department of a company may have specific policies regarding intellectual property, but these policies do not necessarily have a legal backing in all cases, or in some specific cases.
This is because internal rules inside an organization are not a source of law, and only have validity inside the organization because the employees commit themselves to follow them when they sign a contract. After the contract ends, the legalitity of the specific organizational policies is dubious.