Before an application can be made you must ensure that the hedge in question meets the definition of a high hedge. If it does not meet the definition an application cannot be made.
For trees and shrubs to be considered as a high hedge, they must first be a hedge. A hedge is defined by the Oxford English Dictionary as;
'A row of bushes or low trees (such as a hawthorn or privet) planted closely to from a boundary between pieces of land or at the sides of a road'
The High Hedges (Scotland) Act 2013 defines a high hedge as;
A hedge that is
- formed wholly or mainly by a row of two or more trees and shrubs;
- rises to a height of more than 2 metres above ground level; and
- forms a barrier to light (unless gaps significantly mitigate its overall effect as a barrier at heights of more than 2 metres above ground level)