4. General description 
4.3 Components of the IEEE Std 802.11 architecture
Insert a new subclause after subclause 4.3.15 as follows:
4.3.15a Wake-up radio (WUR) STA
The main PHY features in a WUR STA are the following:
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The main MAC features in a WUR STA are the following:
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A WUR non-AP STA can receive a wake-up frame from a WUR AP STA to trigger a transition of the corresponding primary connectivity radio to the awake state.