Backyard cricket - the official rules

Despite the Black Caps loss to Australia yesterday many people in New Zealand have been drawn into the game over the last 6 weeks. So now you may feel inclined to have a knock in your own backyard or beach. So here are the official rules for backyard cricket as stated by Wikipedia. Basically there aren't any, for example: "The wicket may be any convenient object – a chair, a cardboard box, a set of long twigs or sticks, a rubbish bin, tree or a drawing on the wall."