diff --git a/TensionUniverse/BlackHole/Q042_dark_energy_and_cosmic_acceleration.md b/TensionUniverse/BlackHole/Q042_dark_energy_and_cosmic_acceleration.md
index 18199392..4ae39fa2 100644
--- a/TensionUniverse/BlackHole/Q042_dark_energy_and_cosmic_acceleration.md
+++ b/TensionUniverse/BlackHole/Q042_dark_energy_and_cosmic_acceleration.md
@@ -15,7 +15,7 @@ Status: Open
 Semantics: continuous
 E_level: E1
 N_level: N1
-Last_updated: 2026-01-24
+Last_updated: 2026-01-30
 ```
 
 ---
@@ -1033,6 +1033,8 @@ This page is part of the **WFGY / Tension Universe** S problem collection.
 
 For the full Tension Universe effective layer rules and fairness constraints, see the Tension Universe charters:
 
-* TU Effective Layer Charter: `../Charters/TU_EFFECTIVE_LAYER_CHARTER.md`
-* TU Encoding and Fairness Charter: `../Charters/TU_ENCODING_AND_FAIRNESS_CHARTER.md`
-* TU Tension Scale Charter: `../Charters/TU_TENSION_SCALE_CHARTER.md`
+* [TU Effective Layer Charter](../Charters/TU_EFFECTIVE_LAYER_CHARTER.md)
+* [TU Encoding and Fairness Charter](../Charters/TU_ENCODING_AND_FAIRNESS_CHARTER.md)
+* [TU Tension Scale Charter](../Charters/TU_TENSION_SCALE_CHARTER.md)
+* [TU Global Guardrails](../Charters/TU_GLOBAL_GUARDRAILS.md)
+