(2) Definitions .— (A) For purposes of this subsection, the term— (i) “Developed” means a purposeful modification of land, or an interest in land, from its original state that effectuates a condition of gainful and productive present use without further substantial modification. Any such modification shall be performed by the Native individual or Native Corporation. Surveying, construction of roads, providing utilities, or other similar actions, which are normally considered to be component parts of the development process but do not create the condition described in the preceding sentence, shall not constitute a developed state within the meaning of this clause. In order to terminate the exemptions listed in paragraph (1), land, or an interest in land, must be developed for purposes other than exploration, and the exemptions will be terminated only with respect to the smallest practicable tract actually used in the developed state. Any lands previously developed by third-party trespassers shall not be considered to have been developed.; (ii) “Exploration” means the examination and investigation of undeveloped land to determine the existence of subsurface nonrenewable resources; and (iii) “Leased” means subjected to a grant of primary possession entered into for a gainful purpose with a determinable fee remaining in the hands of the grantor. With respect to a lease that conveys rights of exploration and development, the exemptions listed in paragraph (1) shall continue with respect to that portion of the leased tract that is used solely for the purposes of exploration. (B) For purposes of this subsection— (i) land shall not be considered developed solely as a result of— (I) the construction, installation, or placement upon such land of any structure, fixture, device, or other improvement intended to enable, assist, or otherwise further subsistence uses or other customary or traditional uses of such land, or (II) the receipt of fees related to hunting, fishing, and guiding activities conducted on such land; (ii) land upon which timber resources are being harvested shall be considered developed only during the period of such harvest and only to the extent that such land is integrally related to the timber harvesting operation; (iii) land subdivided by a State or local platting authority on the basis of a subdivision plat submitted by the holder of the land or its agent, shall be considered developed on the date an approved subdivision plat is recorded by such holder or agent unless the subdivided property is a remainder parcel; and (iv) lands or interest in lands shall not be considered developed or leased or sold to a third party as a result of an exchange or conveyance of such land or interest in land between or among Native Corporations and trusts, partnerships, corporations, or joint ventures, whose beneficiaries, partners, shareholders, or joint venturers are Native Corporations.