Paragraph 16
An agricultural tractor as defined under regulation 2 of the Motor Vehicles (Construction and Use) Regulations (Northern Ireland) 1999f1 and used on the public roads solely for—
(a)
agriculture, horticulture or forestry purposes;
(b)
activities falling within cutting verges bordering public roads; and
(c)
cutting hedges or trees bordering public roads or bordering verges which border public roads.