No, each Class has a minimum floor (or wall if a climber) surface area (note this is different to enclosure 'size') and a maximum snake length based on the smallest dimension of the enclosure. Several enclosure 'sizes' will have the same area, this is why I say there is no such thing as one enclosure 'size'. Lets look at your enclosures for example:
Your Woma's enclosures have a floor area of 0.6m sq (1.2 x .5). A Woma is a Class C Python requiring a minimum 0.4m Sq m so the area of your enclosure will legally hold a Woma providing the actual snake meets the 20% rule. The 20% rule says that the smallest dimension must not be less than 20% of the snakes length. Your smallest dimension is 0.5m - so the biggest Woma you can legally keep in this enclosure is 0.5 x 5 = 2.5 metres. You can keep your Woma in this enclosure until it is 2.5 metres long.
Your Coastal is a Class D climber....so you can use the floor or the wall as your 'area' measurement. Your largest area is your rear wall so 1.2 x 1.3 = 1.56 square metres. The COPS say a minimum of 0.6 square metres so you romp this requirement in. For your '20%' rule you need to multiply your smallest dimension by 5 to determine the largest snake it can legally hold. Your smallest dimension is your width at 450mm so 0.45 x 5 = 2.25 metres.
In summary, your Woma enclosures comply with Class C providing they do not hold a snake larger than 2.5 metres. They are not large enough to comply with Class D should you ever wish to put adult Class D snakes in them.
Your Coastal enclosure complies with Class D (also meets Class E if you fancy an Olive or a Scrubby) providing it does not hold a snake larger than 2.25 metres.
I have included my calcs for 2 reasons - Others can see how it is applied, and others can check my logic to see that I got it right!
Usual disclaimer applies - I am not the DEH and this is my interpretation and understanding of the COPS