Under the Trespass to Property Act (TPA), in what specific circumstance can a security guard demand identification from an individual?

1. As a general right to identify anyone on the property they are guarding.
2. If the security guard has reasonable grounds to believe the person is trespassing and intends to issue a notice to leave or arrest them.
3. Only if the individual has committed an indictable offence.
4. When issuing a warning for a minor infraction, prior to any arrest or formal action.