In this Subdivision—
"dealing" means a dealing to which Part 4.6 applies;
"unit development"—
(a) applies in relation to a petroleum pool that is partly in a particular licence area of a licensee of a petroleum production licence and partly in—
(i) the licence area of another licensee of a petroleum production licence; or
(ii) an area that is not within the offshore area but in which a person other than the first‑mentioned licensee is lawfully entitled to carry on petroleum recovery operations from the pool; and
(b) means the carrying on of petroleum recovery operations from that pool under cooperative arrangements between the persons entitled to carry on such operations in each of those areas.