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| Category | Heritage Status Criteria [1] |
|---|---|
| A | Buildings of national or international importance, either architectural or historic, or fine little-altered examples of some particular period, style or building type. |
| B | Buildings of regional or more than local importance, or major examples of some particular period, style or building type which may have been altered. |
| C | Buildings of local importance, lesser examples of any period, style, or building type, as originally constructed or moderately altered; and simple traditional buildings which group well with others in categories A and B. |