"Automatic watering systems must not be used except between the hours of midnight and 4:00am on alternative days*.  Hand-held hoses with a trigger nozzle, a bucket or watering can may be used at any time.

*Alternate days means odd numbered houses can water on odd dates of the month and even numbered houses can water on even numbered dates. Both odd and even numbered houses can water on the 31st of the month. Where there is no house number the property is considered an even numbered house."

Remember it's almost impossible to use more water growing vegies at home than what is used to grow supermarket vegies, so get those tomatoes and corn seedlings in the ground now!  More info here and here.