Section 3515.12 - What regulatory provisions apply if I want to exchange a lease or lease right?(a) Except as provided in paragraph (b) of this section, this subpart and the relevant provisions of part 2200 of this title apply to mineral lease exchanges.(b) Exchanges involving the issuance of coal leases, coal lease bidding rights or coal lease modifications are subject to the regulations in subpart 3435 of this chapter rather than to the regulations in this part.