> [!NOTE]
> **Note:** This entity is only used in metadata feeds. It isn't used with pre-election, election, or officeholder feeds.

Indicates how long the feed is valid for.

| Enum value | Description |
|---|---|
| `limited` | A feed that is limited to a small set of related `ElectionEvents` that occur over a short time period, such as the Mexico State General Elections for President, Federal Deputy, Senator, and Vice President that occur on June 02, 2024. Valid for `pre-election` or `election-results` feed types. |
| `yearly` | A feed that contains multiple unrelated sets of `ElectionEvents` that occur throughout a single calendar year, such as all federal and state elections in the United States in 2024. Valid only for the `pre-election` feed type. |
| `evergreen` | A feed that is continuously updated and never expires. Valid for `officeholder`, `election-dates`, `voter-information`, and `committee` feed types. |

## Removing entities from feeds

The rules for when entities can be removed from a feed depend on its longevity:

- `evergreen` feeds: Entities with end dates (such as elections, officeholder tenures, party leadership tenures, and election-specific voter info) and related entities can be safely removed from `evergreen` feeds 60 days after they have ended or 60 days after that end date was added to the feed, whichever is latest.
- `limited` and `yearly` feeds: Entities shouldn't be removed from a `limited` or `yearly` feed at all unless they were added in error.