(a) The applicable period of responsibility for revegetation begins on the date of initial planting for long-term intensive agricultural postmining land use if the commission approves a long-term intensive agricultural postmining land use.
(b) The commission may grant an exception to Section 134.092(a)(19) if the commission issues a written finding approving a long-term intensive agricultural postmining land use as part of the mining and reclamation plan.