Land covenants are standard in residential developments. They are essentially the rules that the owners and occupiers of land within the subdivision/development must abide by and they keep the area and properties within that residential area up to the standard hoped for by the developer and the buyers of properties in that area.
Covenants are relatively harmless and usually confirm the ordinary good neighbour rules that we all try and live by. However, strange and wonderful rules are adopted from time to time. Here are some of examples: