Power steering tank on K12 micra

Hi all,
I decided to top fluid levels up over the holidays and couldn't help but notice that there is no power steering fluid tank (unless it is really well hidden) under the bonnet of my micra (this is a K12 1.5 dci).
Is this normal and if so does this mean that the levels don't need checking (and topping up) unless a fault light comes one?

Thanks in advance for any helpful answers,

Chris
 
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