Complex sentence: Some legal jurisdictions may classify snap guns as burglary tools or otherwise limit their possession, and require a person to be a locksmith by trade or to have some special legal sanction to be in possession of a snap gun.
Split into simpler sentences: Some legal jurisdictions may classify snap guns as burglary tools or otherwise limit their possession. A person may then be required to be a police officer or locksmith by trade, or to have some other legal sanction, to be in possession of a snap gun.