Drafting in Sydney: What is a Private Open Space - Part 2

How much private open space do I need?

What is a Principle Private open space?

example only

The ‘principal private open space’ is a recreation area such as a deck, patio or paved area which is directly accessible from a living area, be screened from the street and receive adequate winter sun to allow it to be used all year round

I'm planning to build a granny flat, do I need a POS for the granny flat as well?