diff --git a/docs/cost/ids/sustainability.md b/docs/cost/ids/sustainability.md
index 7fb54f44..3dd8db9c 100644
--- a/docs/cost/ids/sustainability.md
+++ b/docs/cost/ids/sustainability.md
@@ -499,7 +499,7 @@ Disclose the expected lifetime of the asset. This tends to be part of the design
 :columns: 8
 OC4IDS mapping
 ^^^
-Project Level: Convert to days and map to `assetLifetime.durationInDays`.
+Project Level: Convert to days and map to [`assetLifetime.durationInDays`](project-schema.json,/definitions/Period,durationInDays).
 ```json
 {
   "assetLifetime": {
@@ -1499,7 +1499,7 @@ CoST IDS element
 ^^^
 Disclose dates for project approval:
 
-- submission date 
+- submission date
 - approval date
 ````
 
diff --git a/mapping/sustainability.yaml b/mapping/sustainability.yaml
index e29932d6..eb983734 100644
--- a/mapping/sustainability.yaml
+++ b/mapping/sustainability.yaml
@@ -404,7 +404,7 @@
     module: Economic and fiscal
     indicator: Economic viability
     disclosure format: Disclose the expected lifetime of the asset. This tends to be part of the design report.
-    mapping: 'Project Level: Convert to days and map to `assetLifetime.durationInDays`.'
+    mapping: 'Project Level: Convert to days and map to [`assetLifetime.durationInDays`](project-schema.json,/definitions/Period,durationInDays).'
     example: |-
         {
           "assetLifetime": {
@@ -1259,7 +1259,11 @@
     title: Project approval period
     module: Climate finance
     indicator: Accessibility
-    disclosure format: "Disclose dates for project approval:\n\n- submission date \n- approval date"
+    disclosure format: |-
+        Disclose dates for project approval:
+
+        - submission date
+        - approval date
     mapping: |-
         Project level: