This varies location by location. Especially between different countries. ALL the Organizations can say is FOLLOW THE RULES ESTABLISHED BY "YOUR" LOCAL AUTHORITY HAVING JURISDICTION...(If YOU don't know "tread lightly", With a lot of common sense.) The Organizations can NOT keep track of each and every local law. (and, constant changes.)
Same with ejection charge testing. Some people CAN do in their yards, some CAN'T, some feel it's one way, but it actually is the other. As more places get the "gunshot detection systems", get clarification; if they install it in your area. When I talked to a number of people at the local sheriff department, the consensus was the system COULD/WILL trigger an automated response for all but the smallest charges.
Same with ejection charge testing. Some people CAN do in their yards, some CAN'T, some feel it's one way, but it actually is the other. As more places get the "gunshot detection systems", get clarification; if they install it in your area. When I talked to a number of people at the local sheriff department, the consensus was the system COULD/WILL trigger an automated response for all but the smallest charges.