Cambridge By-law 171-13, s. 6.1(a) — Animal Control By-law

unless such land is zoned for agricultural, open space, industrial or rural residential purposes, or

• (b) if such land is zoned for residential purposes (excluding rural residential purposes) and the coop was in existence prior to October 31, 1987 and has been continuously registered with the City since October 31, 1987 Maintenance and Construction 6.2 Maintenance of Lands and Premises: Any owner of pigeons or other birds shall maintain all lands, premises, and structures where the pigeons or birds are kept in a sanitary condition at all times