31.63. The person who, as owner or lessee or in any other capacity, has the custody of the land shall give free access to the land at any reasonable time to any person required under this division to perform a characterization study or a toxicological and ecotoxicological risk assessment and groundwater impact assessment or to implement a rehabilitation plan, subject, however, to that person restoring the premises to their former state and compensating the owner or custodian of the land, as the case may be, for any damage.