diff --git a/bsip-0040.md b/bsip-0040.md
index 7e7347f..17b81a7 100644
--- a/bsip-0040.md
+++ b/bsip-0040.md
@@ -165,6 +165,7 @@ Normal accounts can only create custom active authoritites with a duration of ma
 * If the active authority of the account is updated, all custom active authorities need to be confirmed in the update. Every unconfirmed one is deleted otherwise
 * Provide operations: `install_custom_active_authority`, `update_custom_active_authority`, `delete_custom_active_authority` to allow changing the custom active permission (3 operation to allow custom transaction fees and avoid having to send the complete list of all authorities for every update)
 * Operation-specific authorities (if present) must be evaluated in incoming transactions
+* Remove expired custom_active_authorities on maintenance
 * Additional committee parameters may be needed to limit the extend of usage of this feature
 
 Notes: The implementation must not differentiate on which operation the custom active authority is applied, all operations are treated in same fashion