through the Chief of the Forest Service. (b) Land conveyance (1) In general Subject to the terms and conditions described in paragraph (2), if the County submits to the Secretary an offer to acquire the National Forest System land for the fair market value, as determined by the appraisal under paragraph (3), the Secretary shall convey the National Forest System land to the County. (2) Terms and conditions The conveyance under paragraph (1) shall be— (A) subject to valid existing rights