diff --git a/technical/6.1.-Conference-Protocol.md b/technical/6.1.-Conference-Protocol.md
index 82740c8f061d934be8c4214640b99bb689e7b632..1dc4b1108b13b432178be550f23c9301cf8f97df 100644
--- a/technical/6.1.-Conference-Protocol.md
+++ b/technical/6.1.-Conference-Protocol.md
@@ -46,6 +46,8 @@ Note: Actually, the word participant is used for callId mixed in a conference. T
 
 The goal is to notify all participants of the metadata of the rendered video. This means what participant is in the conference and where the video is located.
 
+If a participant is itself a conference, its incoming layout info should be merged when sent to other participants. Layout info must not be merged when sent back to a conference.
+
 ### Layout Info
 
 The Layout is stored as a VectorMapStringString for clients and internally with a vector<ParticipantInfo> with the following format: