if rule.NoncurrentVersionExpiration.NewerNoncurrentVersions == 0 {
			continue
		}
		return Event{
			Action:                  DeleteVersionAction,
			RuleID:                  rule.ID,
			NoncurrentDays:          int(rule.NoncurrentVersionExpiration.NoncurrentDays),
			NewerNoncurrentVersions: rule.NoncurrentVersionExpiration.NewerNoncurrentVersions,
		}
	}
	return Event{}

func (e *Evaluator) eval(objs []ObjectOpts, now time.Time) []Event {
	events := make([]Event, len(objs))
	var newerNoncurrentVersions int
loop:
	for i, obj := range objs {
		event := e.policy.eval(obj, now, newerNoncurrentVersions)
		switch event.Action {
		case DeleteAllVersionsAction, DelMarkerDeleteAllVersionsAction:
			// Skip if bucket has object locking enabled; To prevent the

			versionID:              uuid.New().String(),
		},
		// Lifecycle rules with NewerNoncurrentVersions specified must return NoneAction.
		{
			inputConfig:    `<LifecycleConfiguration><Rule><Filter><Prefix>foodir/</Prefix></Filter><Status>Enabled</Status><NoncurrentVersionExpiration><NewerNoncurrentVersions>5</NewerNoncurrentVersions></NoncurrentVersionExpiration></Rule></LifecycleConfiguration>`,
			objectName:     "foodir/fooobject",

	// rule with Transition/NoncurrentVersionTransition in effect
	if event.StorageClass != "" {
		tags[ilmTier] = event.StorageClass
	}

	// rule with NewernoncurrentVersions in effect
	if event.NewerNoncurrentVersions > 0 {
		tags[ilmNewerNoncurrentVersions] = strconv.Itoa(event.NewerNoncurrentVersions)
	}
	if event.NoncurrentDays > 0 {
		tags[ilmNoncurrentDays] = strconv.Itoa(event.NoncurrentDays)
	}
	return tags
}

```

### 3.2 Automatic removal of noncurrent versions keeping only most recent ones after noncurrent days

It is possible to configure automatic removal of older noncurrent versions keeping only the most recent `N` using `NewerNoncurrentVersions`.

e.g, To remove noncurrent versions of all objects keeping the most recent 5 noncurrent versions under the prefix `user-uploads/` 30 days after they become noncurrent ,

```
{
    "Rules": [
        {

	lcXML := `
<LifecycleConfiguration>
       <Rule>
               <ID>max-versions</ID>
               <Status>Enabled</Status>
               <NoncurrentVersionExpiration>
                       <NewerNoncurrentVersions>2</NewerNoncurrentVersions>
               </NoncurrentVersionExpiration>
       </Rule>
       <Rule>
               <ID>delete-all-versions</ID>
               <Status>Enabled</Status>
               <Filter>

			lc.Rules = append(lc.Rules, Rule{
				ID:     ruleID,
				Status: "Enabled",
				Filter: Filter{
					Tag: tag,
					set: true,
				},
				NoncurrentVersionExpiration: NoncurrentVersionExpiration{
					NewerNoncurrentVersions: retainVersions[i],
					set:                     true,
				},
			})
		}
		return lc
	}

	lc := prepLifecycleCfg([]string{"tag3", "tag4", "tag5"}, []int{3, 4, 5})
	evaluator := NewEvaluator(lc)

	es.workers.Store(&workers)
}

// Worker handles 4 types of expiration tasks.
// 1. Expiry of objects, includes regular and transitioned objects
// 2. Expiry of noncurrent versions due to NewerNoncurrentVersions
// 3. Expiry of free-versions, for remote objects of transitioned object which have been expired since.
// 4. Expiry of remote objects corresponding to objects in a
// non-versioned/version suspended buckets