diff --git a/changelogs/client_server/1479.clarification b/changelogs/client_server/1479.clarification
new file mode 100644
index 00000000..f1c4b178
--- /dev/null
+++ b/changelogs/client_server/1479.clarification
@@ -0,0 +1 @@
+Remove outdated text saying that `state_default` is 0 if there is no `m.room.power_levels` event in a room.
diff --git a/data/event-schemas/schema/m.room.power_levels.yaml b/data/event-schemas/schema/m.room.power_levels.yaml
index a24b2e44..7c778c55 100644
--- a/data/event-schemas/schema/m.room.power_levels.yaml
+++ b/data/event-schemas/schema/m.room.power_levels.yaml
@@ -18,11 +18,10 @@ description: |-
   `events_default` for Message Events and `state_default` for State
   Events.
 
-  If there is no `state_default` in the `m.room.power_levels` event, the
-  `state_default` is 50. If there is no `events_default` in the
-  `m.room.power_levels` event, the `events_default` is 0. If the room
-  contains no `m.room.power_levels` event, *both* the `state_default` and
-  `events_default` are 0.
+  If there is no `state_default` in the `m.room.power_levels` event, or
+  there is no `m.room.power_levels` event, the `state_default` is 50.
+  If there is no `events_default` in the `m.room.power_levels` event,
+  or there is no `m.room.power_levels` event, the `events_default` is 0.
 
   The power level required to invite a user to the room, kick a user from the
   room, ban a user from the room, or redact an event sent by another user, is
@@ -33,15 +32,6 @@ description: |-
 
   **Note:**
 
-  As noted above, in the absence of an `m.room.power_levels` event, the
-  `state_default` is 0, and all users are considered to have power level 0.
-  That means that **any** member of the room can send an
-  `m.room.power_levels` event, changing the permissions in the room.
-
-  Server implementations should therefore ensure that each room has an
-  `m.room.power_levels` event as soon as it is created. See also the
-  documentation of the `/createRoom` API.
-
   The allowed range for power level values is `[-(2**53)+1, (2**53)-1]`,
   as required by the [Canonical JSON specification](/appendices/#canonical-json).