You send notification to the chief officer of the department that would respond to a 911 call. If in a city, then it is usually the city PD. If in an unincorporated area, then the county sheriff. If in a city that contracts with the county sheriff/PD, then it goes there. I do not recommend calling 911 and seeing who shows up just to be sure.
As for storage, there are no particular storage requirements for an 03 FFL (Curio & Relic). Just what you are comfortable with, given your particular balance of budget vs. space vs. desire for security.