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Covering a wide range of land use procedures, this bill would make several changes to how Utah cities and counties handle municipal incorporations, planning commissions, and housing rules. Larger cities and certain counties (called "specified municipalities") would be required to allow detached accessory dwelling units — small separate homes on the same lot as an existing house — as a permitted use in residential zones without requiring a special conditional use permit, though cities could still set reasonable rules on size, parking, setbacks, utility access, and design. The bill would also update planning commission ordinances statewide to spell out specific grounds for removing a commission member, such as ethics violations, misuse of public funds, or acting with bias on a pending case, while clarifying that normal deliberation with staff or applicants is not grounds for removal, and it would add ethics and bias-related topics to required annual training. Additionally, the bill would adjust the process for modifying a municipal incorporation request when new land is added (including new notice and exclusion rights for affected landowners), clarify which county land use ordinance changes count as "ministerial" for purposes of shorter public notice, require cash deposits posted as infrastructure completion assurances to be placed in interest-bearing accounts with interest returned to the applicant, and limit when a municipality can deny a building permit once an improvement completion assurance has been accepted.