Section 444.640 - Commission to investigate all reports - release from bond, when1. The commission shall investigate or cause to have investigated the status of reclamation after each report referred to in section 444.580 has been filed.2. If the commission determines that grading has been satisfactorily completed pursuant to the report and as required by this law and the rules and regulations of the commission, the commission shall release up to two-thirds of the bond filed for each acre of land completed.3. If the commission determines that revegetation has been satisfactorily completed, the commission shall release the remainder of the bond for each acre of land completed.