Ordinance amending the Planning Code to define Legacy Business and to require conditional use authorization prior to replacing a Legacy Business with a new non-residential use in certain Neighborhood Commercial, Named Neighborhood Commercial, and Neighborhood Commercial Transit Districts, and in the Chinatown Mixed Use Districts; amending the Administrative Code to allow a business that has been operating for 15 years to qualify as a Legacy Business; affirming the Planning Department’s determination under the California Environmental Quality Act; making findings of consistency with the General Plan and the eight priority policies of Planning Code, Section 101.1; and adopting findings of public necessity, convenience, and welfare under Planning Code, Section 302.