Revise zoning laws to clarify decisions regarding prior nonconforming use of property

This bill amends Montana's zoning laws to establish that when there is ambiguity about whether a property's prior use is allowed, decisions must favor allowing that use to protect property rights. It directly affects property owners, developers, and local zoning officials by clarifying how existing nonconforming uses are interpreted and enforced. The legislation removes the ability of historic preservation boards to review zoning permit applications and variances, while also adding a rebuttable presumption that manufactured homes in residential areas will not negatively impact property values. Additionally, the bill defines tiny dwelling units as residential spaces between 350 and 750 square feet and requires local design review standards to be clear, objective, and necessary for public health or safety.