This task involves the work of defining //initially// trigger the reference check to be activated and presented to people.
=== Heuristic Requirements
//This section will eventually contain the rules that comprise the **initial** reference check heuristic.//
=== Research
//This section is a gathering place for rules we will consider including as part of the initial `Heuristic Requirements`.//
NOTE: both sub-section below assume that a yet-to-be defined threshold of new text content has been surpassed.
==== What factors, unrelated to the edit at-hand, should influence whether reference check is triggered?
//E.g. namespace edit being made within, the account status of the person making the edit (logged in/out), experience level of person editing (number of published edits).//
We'll address this question separately in T329984
==== What qualifies as a "content addition" in this context?
//See more in T324730#8576570.//
- Number of characters or sentences added. //The latter depends on the outcome of T324363.//
==== What content additions do require a reference and therefore should cause the reference check to be triggered?
|Case|Supporting policy|Volunteer contact(s)
|---|---|---|----
==== What content additions do NOT require a reference and therefore should not cause the reference check to be triggered?
//See more in T326856#8550215 and T326856#8601968.//
|Case|Supporting policy|Volunteer contact(s)
|---|---|---|----
|Inserting blank lines| |
|Add an image(s) + caption|[WP:ORIMAGE](https://en.wikipedia.org/wiki/Wikipedia:No_original_research#Original_images)|@Sdkb
|Adding new content that they //do// accompany with a reference| ---|
|Adding a template| |
|Adding new content to the lead section of an article| [en:WP:LEADCITE](https://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Lead_section), [fr:Wikipédia:Résumé_introductif](https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:R%C3%A9sum%C3%A9_introductif#R%C3%A9f%C3%A9rences) |@Sdkb
|Adding new content to plot sections |[en:WP:PLOTCITE](https://en.wikipedia.org/wiki/Wikipedia:How_to_write_a_plot_summary)|@Sdkb