diff --git a/Assessments/Tradon/GL_001/source_material.md b/Assessments/Tradon/GL_001/source_material.md
index bf713a1..dab0cb5 100644
--- a/Assessments/Tradon/GL_001/source_material.md
+++ b/Assessments/Tradon/GL_001/source_material.md
@@ -4,6 +4,7 @@
 
 | Item | Value |
 | --- | --- |
+| Intake source document | `Tradon/general_ledger_gap_analysis.md` |
 | Repository source document | `source_documents/general_ledger_gap_analysis.md` |
 | Source analysis date | 2026-05-05 |
 | Imported into assessment | 2026-05-07 |
@@ -42,4 +43,4 @@ The content in this folder restructures the source analysis into reusable assess
 - `open_points.md`
 - `decisions.md`
 
-The repository copy in `source_documents/general_ledger_gap_analysis.md` is the retained source reference for this assessment.
+The incoming source was copied from `Tradon/general_ledger_gap_analysis.md` into `source_documents/general_ledger_gap_analysis.md`. The assessment copy in `source_documents/` is the retained source reference for this assessment.
diff --git a/Assessments/Tradon/README.md b/Assessments/Tradon/README.md
index 772b834..0ec92b9 100644
--- a/Assessments/Tradon/README.md
+++ b/Assessments/Tradon/README.md
@@ -24,6 +24,7 @@ Each exposed report should have its own folder:
 Assessments/
   Tradon/
     <REPORT_CODE>/
+      source_documents/
       exposure_notes.md
       gap_mapping.md
       open_points.md
@@ -31,6 +32,18 @@ Assessments/
       source_material.md
 ```
 
+## Source material intake
+
+Initial GAP analysis files for each report are received in the repository root folder `Tradon/`. These files may be pushed by another Git user and should be treated as incoming source material.
+
+When an assessment is created or refreshed on request, copy the relevant GAP analysis file from `Tradon/` into the assessment folder under:
+
+```text
+Assessments/Tradon/<REPORT_CODE>/source_documents/
+```
+
+The assessment process does not change after intake: use the copied repository source as the retained evidence, document traceability in `source_material.md`, and keep the analysis outputs in the assessment files.
+
 ## File roles
 
 | File | Role |