The Inspector-General can enter certain places at a reasonable time if they think it will help with an investigation. You can think of these places as areas used by the Defence Force, like a defence area, a naval ship, or other vehicles and aircraft they use. The Inspector-General must tell the Chief of Defence Force beforehand that they plan to enter one of these places. The Inspector-General has to follow any rules the person in charge of the place sets when they enter. These rules are made under section 101 of the Defence Act 1990 for the security of defence areas, which is related to section 93 of that Act. The Inspector-General must also understand what certain words mean, like aircraft, defence area, naval ship, officer, and ship, which are defined in section 2(1) of the Defence Act 1990. This rule is also connected to section 32, which has more information about it. The Inspector-General's power to enter these places is an important part of their job. They use this power to help with investigations and make sure everything is working correctly.