(a) The annual rental for all non-conflicted leases shall be the amount bid by the applicant, if accepted by the Board. In no event shall the annual rental be less than the minimum rate established in subsection (b) of this section.
(b) The minimum annual rental shall be: Private land lease rate on a per AUM basis, averaged for the five years preceding the current year, as estimated by the Wyoming Agricultural Statistics Service; times the five year weighted average "parity ratio" for beef cattle per cwt. as established by the National Agricultural Statistics Service as an adjustment for changing resource conditions, market demand and industry viability; less 20% to reflect contributions made by the lessee.
(c) All leases are subject to change upon reappraisal or reclassification of the land, or a change in the minimum annual rental as provided for in subsection (b) of this section.
(d) Upon notice provided not less than thirty (30) days prior to the anniversary date of a lease, all rentals accruing to the state, except those for the first year, shall become due and payable at the Office on the anniversary date of the lease. If the rent is not paid on the anniversary date, the Director shall notify the lessee or his authorized agent by certified mail that the lease will be canceled if the rent and a late fee equal to ten percent (10%) of the annual rental is not received within thirty (30) days following the date of the notice. If the lease is canceled, the Director shall as soon as possible, thereafter, advertise the lands in the county where located, as vacant and subject to lease.
060-4 Wyo. Code R. § 4-6