Parking restrictions always apply across the full width of a highway (or across half the width if the restrictions only apply to one side of the road). As far as the law is concerned, the boundary of the highway runs right up to the wall, fence, hedge (or whatever) that defines the boundary of the property alongside the highway. So 'clearway' rules will always apply to footpaths, verges, etc alongside the road.
It's similar to a situation which occurred on Herries Road in Sheffield, which is close to Hillsborough Stadium. Sheffield Wednesday fans had been in the habit of parking on the 'rough verge' there for many years, even though there were yellow lines present on the road. After one game though, dozens of fans left a game to find that their cars had all been (quite correctly) 'ticketed' because the parking restriction applies just as much to the verge as it does to the road.
Chris