diff --git a/book/source/04-certificates.md b/book/source/04-certificates.md
index 43e388a..da86d38 100644
--- a/book/source/04-certificates.md
+++ b/book/source/04-certificates.md
@@ -250,6 +250,19 @@ Linking a User ID to an OpenPGP certificate
 explain metadata associated with this signature, and that c-r prefers this over primary user id.
 ```
 
+
+### Revocations
+
+```{admonition} TODO
+:class: warning
+
+This section only contains notes and still needs to be written
+```
+
+Note: certification signatures [can be made irrevocable](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#name-revocable).
+
+#### Hard vs. soft revocations
+
 (third_party_cert)=
 ## Third party (identity) certifications
 
@@ -259,19 +272,6 @@ explain metadata associated with this signature, and that c-r prefers this over
 This section needs writing
 ```
 
-## Revocations
-
-```{admonition} TODO
-:class: warning
-
-This section only contains notes and still needs to be written
-```
-
-Note: certification signatures [can be made irrevocable](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#name-revocable). 
-
-### Hard vs. soft revocations
-
-
 ## Advanced topics
 
 ```{admonition} TODO