Pervasively Regulated Industries
When a dealer chooses to engage in this pervasively regulated business and to accept a federal license, he does so with the knowledge that his business records, firearms, and ammunition will be subject to effective inspection.
Each licensee is annually furnished with a revised compilation of ordinances that describe his obligations and define the inspector's authority. The dealer is not left to wonder about the purposes of the inspector or the limits of his task. (Biswell)