diff --git a/src/main/java/world/bentobox/challenges/ChallengesAddon.java b/src/main/java/world/bentobox/challenges/ChallengesAddon.java
index e9e9213..0a51e17 100644
--- a/src/main/java/world/bentobox/challenges/ChallengesAddon.java
+++ b/src/main/java/world/bentobox/challenges/ChallengesAddon.java
@@ -2,6 +2,7 @@ package world.bentobox.challenges;
 
 
 import org.bukkit.Bukkit;
+import org.bukkit.Material;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
@@ -9,7 +10,9 @@ import java.util.Optional;
 import world.bentobox.bentobox.api.addons.Addon;
 import world.bentobox.bentobox.api.addons.GameModeAddon;
 import world.bentobox.bentobox.api.configuration.Config;
+import world.bentobox.bentobox.api.flags.Flag;
 import world.bentobox.bentobox.hooks.VaultHook;
+import world.bentobox.bentobox.managers.RanksManager;
 import world.bentobox.challenges.commands.ChallengesCommand;
 import world.bentobox.challenges.commands.ChallengesUserCommand;
 import world.bentobox.challenges.commands.admin.Challenges;
@@ -69,6 +72,21 @@ public class ChallengesAddon extends Addon {
      */
     private static final String PERMISSION_PREFIX = "addon";
 
+	/**
+	 * This flag allows to complete challenges in any part of the world. It will not limit
+	 * player to their island. Useful for skygrid without protection flags.
+	 */
+	public static Flag CHALLENGES_WORLD_PROTECTION =
+		new Flag.Builder("CHALLENGES_WORLD_PROTECTION", Material.GRASS_BLOCK).type(Flag.Type.WORLD_SETTING).defaultSetting(true).build();
+
+	/**
+	 * This flag allows to define which users can complete challenge. F.e. it can be set
+	 * that only Island owner can complete challenge.
+	 * By default it is set to Visitor.
+	 */
+	public static Flag CHALLENGES_ISLAND_PROTECTION =
+		new Flag.Builder("CHALLENGES_ISLAND_PROTECTION", Material.COMMAND_BLOCK).defaultRank(RanksManager.VISITOR_RANK).build();
+
 
 // ---------------------------------------------------------------------
 // Section: Methods
@@ -122,6 +140,9 @@ public class ChallengesAddon extends Addon {
 					new Challenges(this, gameModeAddon.getAdminCommand().get());
 					this.hooked = true;
 				}
+
+				CHALLENGES_WORLD_PROTECTION.addGameModeAddon(gameModeAddon);
+				CHALLENGES_ISLAND_PROTECTION.addGameModeAddon(gameModeAddon);
 			}
 		});
 
@@ -172,6 +193,10 @@ public class ChallengesAddon extends Addon {
             // Register the autosave listener.
             this.registerListener(new SaveListener(this));
 
+            // Register Flags
+			this.getPlugin().getFlagsManager().registerFlag(CHALLENGES_ISLAND_PROTECTION);
+			this.getPlugin().getFlagsManager().registerFlag(CHALLENGES_WORLD_PROTECTION);
+
             // Register Request Handlers
             this.registerRequestHandler(new ChallengeListRequestHandler(this));
             this.registerRequestHandler(new LevelListRequestHandler(this));
diff --git a/src/main/java/world/bentobox/challenges/tasks/TryToComplete.java b/src/main/java/world/bentobox/challenges/tasks/TryToComplete.java
index faddb4d..cfebb86 100644
--- a/src/main/java/world/bentobox/challenges/tasks/TryToComplete.java
+++ b/src/main/java/world/bentobox/challenges/tasks/TryToComplete.java
@@ -350,11 +350,20 @@ public class TryToComplete
             result = EMPTY_RESULT;
         }
         // Player is not on island
-        else if (!this.addon.getIslands().userIsOnIsland(this.user.getWorld(), this.user))
+        else if (ChallengesAddon.CHALLENGES_WORLD_PROTECTION.isSetForWorld(this.world) &&
+            !this.addon.getIslands().userIsOnIsland(this.user.getWorld(), this.user))
         {
             this.user.sendMessage("challenges.errors.not-on-island");
             result = EMPTY_RESULT;
         }
+        // Check player permission
+        else if (!this.addon.getIslands().getIslandAt(this.user.getLocation()).
+            map(i -> i.isAllowed(this.user, ChallengesAddon.CHALLENGES_ISLAND_PROTECTION)).
+            orElse(false))
+        {
+            this.user.sendMessage("challenges.errors.no-rank");
+            result = EMPTY_RESULT;
+        }
         // Check if user has unlocked challenges level.
         else if (!this.challenge.getLevel().equals(ChallengesManager.FREE) &&
             !this.manager.isLevelUnlocked(this.user, this.world, this.manager.getLevel(this.challenge.getLevel())))
diff --git a/src/main/resources/locales/en-US.yml b/src/main/resources/locales/en-US.yml
index b8c22b9..d430cef 100755
--- a/src/main/resources/locales/en-US.yml
+++ b/src/main/resources/locales/en-US.yml
@@ -315,4 +315,14 @@ challenges:
         import-no-file: '&cCould not find challenges.yml file to import!'
         no-load: '&cError: Could not load challenges.yml. [message]'
         load-error: '&cError: Cannot load [value].'
-version: 7
\ No newline at end of file
+        no-rank: "&cYou do not have rank to do that."
+protection:
+    flags:
+        CHALLENGES_ISLAND_PROTECTION:
+            description: "&5&oToggle who can\n&5&ocomplete challenges"
+            name: "Challenges protection"
+        CHALLENGES_WORLD_PROTECTION:
+            description: "&5&oThis allows to enable/disable\n&5&orequirement for players to\n&5&obe on their island to\n&5&ocomplete a challenge."
+            name: "Challenges Island limitation"
+            hint: "No challenges outside island"
+version: 8
\ No newline at end of file