Original sentence: Any pony registered with other American, British, or Canadian registroes can be registered if it meets the pedigree and conformation standards of the SPSNA.Shetland Pony Society of North America.Shetland ponies registered with the SPSBS cannot be taller than 42" at maturity.There are several major registries for Shetland ponies, the Shetland Pony Stud Book Society (SPSBS) based in UK, American Shetland Pony Club (ASPC)and the Shetland Pony Society of North America (SPSNA), both  based in the USA and the  also based in the USA
Edited sentence: Any pony registered with the American, British, or Canadian registry can be registered if it meets the pedigree and conformation standards of the SPSNA.Shetland ponies registered with the SPSB cannot be taller than 42" at maturity.There are three main registries for Shetland ponies, the Shetland Pony Stud Book Society (SPSBS) based in UK, the Shetland Pony Society of North America (SPSNA) () based in the USA and the American Shetland Pony Club (ASPC) also based in the USA