Defines the conditions for the expiration date of a tier.
| Name | Type | Description | Notes |
|---|---|---|---|
| type | str | What triggers the tier to expire for a customer. `END_OF_PERIOD`: Expire tier at the end of the period. `END_OF_NEXT_PERIOD`: Expire tier at the end of the next period. `BALANCE_DROP`: Tier expires when the points balance drops below the required range of the tier. `CUSTOM`: Tier expires after a certain time period passes following the instance the points balance drops below the required range of the tier. | [optional] |
| extend | str | Extend the expiration by adding extra months or days in ISO 8601 format. The tier will remain active even though it reaches its expiration time period. For example, a tier with a duration of `P3M` will be valid for an additional duration of 3 months and a tier with a duration of `P1D` will be valid for an additional duration of 1 day. | [optional] |
| rounding | LoyaltyTiersExpirationAllExpirationDateRounding | [optional] |