The bill makes the following key changes. It makes rules for mixed and multi-purpose buildings clearer; clarifies regulations relating to repairing buildings and land following a landslip or other land damage; simplifies the excessive calculations for retaining walls, bridges, and culverts; introduces a claimant code and a standing dispute resolution service; and changes the name to the National Hazards Commission to reflect the broad range of hazards covered by the Act and dealt with by the commission.