Purpose and applicability of article. Definitions. Effect of article on state and local enforcement authorities. Alteration or repair without total compliance with new construction requirements. Identification and correction of certain conditions or defects. Consideration of compliance alternatives. Compliance alternatives for inadequate number of exits. Compliance alternatives for excessive travel distances to approved exit. Compliance alternatives for unenclosed or improperly enclosed exit stairways or vertical shafts. Compliance alternatives for inadequate fire partitions or walls.