It shall be sufficient evidence that a person was trafficking in any alcoholic liquor in any premises or place without holding a licence in that behalf if it is proved—
(a)that a person other than the owner or occupier of such premises or place was at the time charged found therein drunk or drinking, or having had drink supplied to him therein; and
(b)either that such premises are or such place is, by repute, kept for the illegal sale of alcoholic liquor or that at the time charged such premises or place contained drinking utensils and fittings usually found in licensed premises.