(3) a group composed of at least two of the persons contemplated in paragraphs 1 and 2 and which(a) engages in or intends to engage in harvesting operations in a forest of which they have undivided ownership or are co-lessees; or
(b) engages in or intends to engage, jointly, in harvesting operations in several forests each of which is owned or leased individually or jointly by one of such persons, or in respect of which each of them has interests as a permit holder or manager.