Spud gun legality and requires licensing. Pneumatic spud guns are classed as air guns in New Zealand, which means the owner must be either over 18, or over 16 with a A-Category Arms License. Combustion cannons are deemed a firearm, requiring the owner to hold an A-Category License. These laws are rarely, if ever applied and spud gun ownership and building has proved a popular hobby with many New Zealanders. All combustion spud guns are considered firearms. Pneumatic spud guns with projectile energy greater than 4 joules (3 ft·lbf) are classified as section 1 firearms and do require a license. In recent years,
Slang legal setting, as both are arenas in which standard language is considered necessary and/or whether the term has been entered in the Oxford English Dictionary, which some scholars claim changes its status as slang. It is often difficult to collect etymologies for slang terms, largely because slang is a phenomenon of speech, rather than written language and etymologies which are typically traced via corpus. Eric Partridge, cited as the first to report on the phenomenon of slang in a systematic and linguistic way, postulated that a term would likely be in circulation for a decade before it would be written