A gov directive exempts some vehicles from using as tachograph
"Vehicles operated exclusively on islands whose area does not exceed 2,300 kilometres square and that are not linked to the rest of Great Britain by a bridge, ford or tunnel open for use by a motor vehicle."
Does this mean that no part of the island may extend beyond the margins of a square measuring 2300km x 2300km?
Or 2,300 square km, e.g. 48km x 48km
What should I do?