3.—In this section “derelict site” means any land (in this section referred to as “the land in question”) which detracts, or is likely to detract, to a material degree from the amenity, character or appearance of land in the neighbourhood of the land in question because of—

(a) the existence on the land in question of structures which are in a ruinous, derelict or dangerous condition, or

(b) the neglected, unsightly or objectionable condition of the land or any structures on the land in question, or

(c) the presence, deposit or collection on the land in question of any litter, rubbish, debris or waste, except where the presence, deposit or collection of such litter, rubbish, debris or waste results from the exercise of a right conferred by or under statute or by common law.