diff --git a/01.md b/01.md
index dafea1d..681fc99 100644
--- a/01.md
+++ b/01.md
@@ -96,10 +96,6 @@ These are just conventions and relay implementations may differ.
 
 Relays expose a websocket endpoint to which clients can connect. Clients SHOULD open a single websocket connection to each relay and use it for all their subscriptions. Relays MAY limit number of connections from specific IP/client/etc.
 
-### Meaning of WebSocket status codes
-
-- When a websocket is closed by the relay with a status code `4000` that means the client shouldn't try to connect again.
-
 ### From client to relay: sending events and creating subscriptions
 
 Clients can send 3 types of messages, which must be JSON arrays, according to the following patterns: