There is some regulation on the keeping of cats, although little when compared to that upon dogs.
Is cat registration compulsory?
Cat registration is not required under the Dog and Cat Management Act 1995 (SA), but may be required pursuant to by-laws made by individual local councils [s 90(2)(e)]. Please consult your local council. Councils can also limit the number of cats kept on premises and so forth, see Powers of local councils.
In most instances it is, however, compulsory to both microchip and desex a cat, see Microchipping and Desexing.