What is proprietary or "in-house"?

Exclusively owned or private. For example: Kings Dominion Amusement Park employs personnel for their security needs. Kings Dominion is a proprietary business and their security employees are "in-house" proprietary security personnel. Additionally, "loss prevention" or "assets protection" for stores such as Kmart or Target are individuals employed by the company and therefore are not required to be registered with DCJS.