What are the requirements for material to be copyright?

For copyright to subsist:

1. there must be an expression of ideas in a literary, dramatic, musical or artistic work, or in subject matter other than works, such as in an audio-visual performance
2. the work must be original
3. the work must be recorded in a 'material form', for example
   1. written down on paper or something else
   2. recorded by keystrokes saved on a computer
   3. recorded on film
   4. recorded on tape
   5. recorded as software code saved on a computer
   6. recorded digitally onto a device
4. there must be an author or artist.