# Placement Rule Options - cont'd

+ Placement options depend on labels correctly specified in the configuration of each `TiKV` node. For example, the `PRIMARY_REGION` option depends on the region label in TiKV. To see a summary of all labels available in your TiKV cluster, use the statement SHOW PLACEMENT LABELS:

```
mysql> show placement labels;
+--------+----------------+
| Key    | Values         |
+--------+----------------+
| disk   | ["ssd"]        |
| region | ["us-east-1"]  |
| zone   | ["us-east-1a"] |
+--------+----------------+
3 rows in set (0.00 sec)
```

+ When you use CREATE PLACEMENT POLICY to create a placement policy, TiDB does not check whether the labels exist. Instead, TiDB performs the check when you attach the policy to a table.

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