Health and Safety Code § 12123

The journal, record book or record of sale shall be kept by the person required to keep it in his principal office or place of business. It shall be at all times, on proper demand, subject to the inspection and examination of any chief or other duly authorized law enforcement official. In addition, if the principal office or place of business is located in a place other than the county within which the explosives are possessed, stored, used, sold, given away, delivered, or otherwise disposed of, field records shall be kept in that county during the period of such possession, storage, use, sale, gift, delivery or other disposition.