504E.3 Compliance Tiers.

Each building not exempt from this Chapter shall be assigned to one of the following Compliance Tiers:

1. Tier I: Buildings that contain a Group A, E, R-2.1, R-3.1 or R-4 occupancy on any story.

2. Tier II: Buildings containing 15 or more dwelling units except for buildings assigned to Tier I or Tier IV.

3. Tier III: Buildings not falling within the definition of another tier.

4. Tier IV: Buildings that contain a Group B or M occupancy on the first story or in a basement or under-floor area that has any portion extending above grade, and buildings that are in mapped liquefaction zones, except for buildings assigned to Tier I.