diff --git a/src/GamCommands.txt b/src/GamCommands.txt
index b758097b..09a031ab 100644
--- a/src/GamCommands.txt
+++ b/src/GamCommands.txt
@@ -3826,6 +3826,7 @@ gam audit monitor list <EmailAddress>
         (sendmessagedenynotification <Boolean>)|
         (spammoderationlevel allow|moderate|silently_moderate|reject)|
         (whocanadd all_members_can_add|all_managers_can_add|all_owners_can_add|none_can_add)|
+        (whocanaddexternalmembers only_owners_can_add_external_members|end_users_can_add_external_members)|
         (whocancontactowner anyone_can_contact|all_in_domain_can_contact|all_members_can_contact|all_managers_can_contact|all_owners_can_contact)|
         (whocanjoin anyone_can_join|all_in_domain_can_join|invited_can_join|can_request_to_join)|
         (whocanleavegroup all_members_can_leave|all_managers_can_leave|all_owners_can_leave|none_can_leave)|
@@ -3955,6 +3956,7 @@ gam delete group|groups <GroupEntity> [noactionifalias]
         spammoderationlevel|
         whocanaddreferences|
         whocanadd|
+        whocanaddexternalmembers|
         whocanapprovemessages|
         whocanassigntopics|
         whocanassistcontent|
diff --git a/src/GamUpdate.txt b/src/GamUpdate.txt
index e521240a..5c40dd61 100644
--- a/src/GamUpdate.txt
+++ b/src/GamUpdate.txt
@@ -1,3 +1,10 @@
+7.40.03
+
+Added option `whocanaddexternalmembers only_owners_can_add_external_members|end_users_can_add_external_members` to `<GroupSettingsAttribute>`.
+It appears that `allowexternalmembers true` must be set in the same command.
+Added option `whocanaddexternalmembers` to `<GroupFieldName>`.
+These options are not in general release as of 2026-04-13; experiment.
+
 7.40.02
 
 Updated `gam info|print cigroups` and `gam print|show cigroup-members` to handle trap caused
diff --git a/src/gam/__init__.py b/src/gam/__init__.py
index 8bcaf904..f6b065b2 100755
--- a/src/gam/__init__.py
+++ b/src/gam/__init__.py
@@ -25,7 +25,7 @@ https://github.com/GAM-team/GAM/wiki
 """
 
 __author__ = 'GAM Team <google-apps-manager@googlegroups.com>'
-__version__ = '7.40.02'
+__version__ = '7.40.03'
 __license__ = 'Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)'
 
 # pylint: disable=wrong-import-position
@@ -33826,6 +33826,9 @@ GROUP_SETTINGS_ATTRIBUTES = {
   'sendmessagedenynotification': ['sendMessageDenyNotification', {GC.VAR_TYPE: GC.TYPE_BOOLEAN}],
   'spammoderationlevel': ['spamModerationLevel', {GC.VAR_TYPE: GC.TYPE_CHOICE,
                                                   'choices': {'allow': 'ALLOW', 'moderate': 'MODERATE', 'silentlymoderate': 'SILENTLY_MODERATE', 'reject': 'REJECT'}}],
+  'whocanaddexternalmembers': ['whoCanAddExternalMembers', {GC.VAR_TYPE: GC.TYPE_CHOICE,
+                                                            'choices': {'onlyadminscanaddexternalmembers': 'ONLY_ADMINS_CAN_ADD_EXTERNAL_MEMBERS',
+                                                                        'enduserscanaddexternalmembers': 'END_USERS_CAN_ADD_EXTERNAL_MEMBERS'}}],
   'whocancontactowner': ['whoCanContactOwner', {GC.VAR_TYPE: GC.TYPE_CHOICE,
                                                 'choices': {'anyonecancontact': 'ANYONE_CAN_CONTACT', 'allindomaincancontact': 'ALL_IN_DOMAIN_CAN_CONTACT',
                                                             'allmemberscancontact': 'ALL_MEMBERS_CAN_CONTACT', 'allmanagerscancontact': 'ALL_MANAGERS_CAN_CONTACT',