What triggers the need for a new validation queue?

The need for a new validation queue is triggered when there is a change in the status of documents that fundamentally affects the validation process. This includes adding uncoded documents after the validation has started, which introduces new items that must undergo validation and hence create a need for a separate queue to manage them properly.

Moreover, changing positive coded documents to neutral status alters the accepted classifications in the current validation process, potentially requiring those documents to be re-evaluated under a new set of criteria. This duality of actions—adding new uncoded documents and changing the statuses of existing positive codes—creates complexities that necessitate the establishment of a new validation queue to ensure accuracy and integrity in the review process. Therefore, the correct answer encompasses both scenarios, leading to the conclusion that a new validation queue is indeed warranted.