diff --git a/07.md b/07.md
index 6c663224..41a73264 100644
--- a/07.md
+++ b/07.md
@@ -24,6 +24,10 @@ async window.nostr.nip44.encrypt(pubkey, plaintext): string // returns ciphertex
 async window.nostr.nip44.decrypt(pubkey, ciphertext): string // takes ciphertext as specified in nip-44
 ```
 
+### On event `id`
+
+Apps and libraries SHOULD delegate generation of event `id` to signers, this allows injection of NIP-13 Proof of Work support through signers.
+
 ### Implementation
 
 See https://github.com/aljazceru/awesome-nostr#nip-07-browser-extensions.