15 acres isn't very big. One acre is approximately 208.71 feet × 208.71 feet. 15 acres is about 1043 yards by 1043 yards, if they were all square. You'd be ok with a shotgun, but not so much with any rifle. You have to know what is behind whatever you shoot at, out to several miles/kilometers. Even with a .22.
In any case, the Municipal Office will be able to tell you about by-laws. Most of 'em have their by-laws on-line too. A 'net search for the municipality will get you there. Then look for 'By-Laws' and search it.Otherwise, it's a phone call, during business hours.