>May be state by state but an officer cannot give fault on private property.
The law makes certain exceptions for so-called "private" property. For example, a public shopping mall parking lot is private property, but officers can drive onto them without a previous summons or warrant. Similarly, police officers can drive into the parking garage and if they see non-handicapped cars parking in handicapped spaces, they can write a ticket.
Generally, police will not use their state-given ability to patrol corporate lots. The police used to drive through our corporate factory parking lots looking for expired tabs. It's easy hunting for the computer scanner since so many cars are all nicely lined up. But the employees started complaining loudly to management and the company told the police please don't use your ability here. The police used to do that at shopping malls too, but the malls complained that could drive away customers. So the police no longer patrol those lots for tabs.
