Really! Are we going to debate the technical descriptions between words like Unlawful and Illegal?
OK fair enough. We will use the term unlawful.
Here are a couple of other descriptions:
DescriptionsMurder The
unlawful killing of another person where there is either the intent to kill, or the intent to cause grievous bodily harm with the knowledge that it was probable that death or grievous bodily harm would occur, or without intent to kill in the course of committing a crime.
Attempted Murder The attempted
unlawful killing of another person where there is either the intent to kill, or the intent to cause grievous bodily harm with the knowledge that it was probable that death or grievous bodily harm would occur but where death did not actually occur.
Steal Motor Vehicle Unlawfully using a motor vehicle without the consent of the owner or the person in charge of that motor vehicle. 'Steal motor vehicle' excludes attempts to steal a motor vehicle, damaging or tampering/ interfering with a motor vehicle, or the theft of motor vehicle parts or the contents of a motor vehicle. For the purpose of this offence category, a motor vehicle is defined as a self-propelled vehicle that runs on a land surface (but is not restricted to rails or tram lines) and is eligible for registration for use on public roads, or could be made eligible for registration for use on public roads with modifications that would not change the essential nature of the vehicle. 'Steal motor vehicle' therefore excludes the theft of some types of motorised vehicle such as large mining trucks (super-haulers), gophers (motorised wheel chairs), golf carts, miniature motor cycles (pocket rockets), go carts and motorised bicycles/scooters, and also excludes the theft of trailers, semi-trailers or caravans (regardless of whether or not they were attached to a motor vehicle at the time of theft).
Theft The
unlawful taking or obtaining of money, goods or services, without the use of force, threat of force or violence, coercion or deception, with the intent to permanently deprive the owner or possessor of the use of the money or goods. This category of offence includes the theft of vehicle parts or the contents of a vehicle.
http://www.police.wa.gov.au/ABOUTUS/Statistics/CrimeOffenceDescriptions/tabid/1213/Default.aspx