The code has been changed five times since it began in 1962 based on a couple of Supreme Court rulings.
Number of Unrelated Adults Allowed to share a House in Greeley
1962 – unlimited
1966- U +2
1974 – Supreme Court ruled localities may limit number of unrelated individuals within a household.
1976 – U+0
1977 – Supreme Court ruled that localities may not restrict biological relatives from joining a household.
1980 – U+1 (Owners)
1990 – U + 1