for hardrock minerals for 3 years on up to 200 acres of contiguous or non-contiguous Federal land. The Secretary shall charge a reasonable application fee for such a lease. Rentals for such a lease shall be $5 per acre per year for the first 3 years. Such leases may be renewed for additional 3-year periods, with no limit, with a $10 per acre per year rental charged for renewed leases. Any individual may file a challenge with the Secretary that a leaseholder is in violation of the diligence terms of a small miners lease or not qualified as a small miner. A small miners lease that is under such a challenge may not be renewed unless the Secretary has determined that the leaseholder is a small miner and is in compliance with all the terms of the lease. No royalties shall be charged for commercial production under a small miners lease. (b) Conversion of existing claims An existing claim, as of January 1, 2017, that belongs to an individual that qualifies as a small miner may be converted to a small miners lease under the same terms and conditions that apply to other small miners leases, except that such lease— (1) shall not be subject to rental during the primary term of the lease