Update labs; update submission instructions

Author: lgienapp

content/calls/submitting.md

@@ -11,17 +11,35 @@ menu:
     weight: 30
 ---
 
-CLEF 2026 uses EasyChair for all submission types. This page provides instructions for accessing and using the submission platforms.
+CLEF 2026 features two kinds of submissions:
+- **Conference Papers**, peer-reviewed articles published in the Springer Lecture Notes in Computer Science (LNCS) series.
+- **Labs Working Notes**, reports describing the experiments carried out during the CLEF evaluation campaigns, published in digital form in the CEUR-WS Proceedings.
 
-## Lab Proposal Submissions
+CLEF 2026 uses EasyChair for all submission types. 
 
-Lab proposal submission is closed.
+## Conference Paper Submissions
 
-## Paper Submissions
+Authors are invited to electronically submit original papers, which have not been published and are not under consideration elsewhere. Two categories of papers will be accepted:
 
-Papers are to be submitted in Springer LNCS format. Author information, formatting instructions, and templates can be found in Springers' official author instructions. The License-to-Publish form will be distributed together with acceptance notifications.
+- Long papers: 12 pages plus references
+- Short papers: 6 pages plus references
+
+Papers should be anonymous, sharing code and data with reviewers should be done via anonymous repositories like, for example, https://anonymous.4open.science/.
+
+Papers are to be submitted in **Springer LNCS format**. Author information, formatting instructions, and templates can be found in Springers' official author instructions. The License-to-Publish form will be distributed together with acceptance notifications.
 
 {{< button href="https://www.springer.com/gp/computer-science/lncs/conference-proceedings-guidelines" type="primary" size="md">}} 
 <svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='3' stroke='currentColor' class='size-3 flex-none my-auto'><path stroke-linecap='round' stroke-linejoin='round' d='m4.5 19.5 15-15m0 0H8.25m11.25 0v11.25' /></svg>
 <span class='flex-1 my-auto ml-2'> Author Instructions </span>
 {{< /button >}}
+
+## Labs Working Notes & Task Overview Papers
+
+For each task at CLEF 2026, participants must submit working notes describing their systems and organizers must submit an overview describing their task, the data used, the teams that participated and their approaches, the results obtained and the analysis of those results. The organizers of each task are responsible for collecting the working notes from their participants. 
+
+Both working notes and task overviews are to be submitted in **1-column CEURART format**. Submissions are expected to be in English language and 5 pages minimum, with no maximum page limit.
+
+{{< button href="https://ceur-ws.org/Vol-XXX/CEURART.zip" type="primary" size="md">}} 
+<svg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke-width='3' stroke='currentColor' class='size-3 flex-none my-auto'><path stroke-linecap='round' stroke-linejoin='round' d='m4.5 19.5 15-15m0 0H8.25m11.25 0v11.25' /></svg>
+<span class='flex-1 my-auto ml-2'> CEURART Template </span>
+{{< /button >}}