The presumption with all the POIs is that they are NOT height restricted.
Originally when I created the POI categories the RA acronym did not exist. If, for example, a CR (Car Park Rural) had access difficulties, such as a narrow road in a particular direction, the name was enclosed in square brackets e.g. [CR Timbuktu].
When the POI app was introduced all the restricted access locations became merely RA so the example above would have become RA Timbuktu.
The description still retains the details of the restriction that affects the POI.