Index: binaries/data/mods/public/simulation/components/Controllability.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/components/Controllability.js
@@ -0,0 +1,93 @@
+class Controllability
+{
+	get Schema()
+	{
+		return "<a:help>Deals with the controllability of structures and units.</a:help>" +
+			"<a:example>" +
+				"<Controllable>true</Controllable>" +
+			"</a:example>" +
+			"<element name='Controllable' a:help='Whether any commands can be issued.'>" +
+				"<data type='boolean'/>" +
+			"</element>" +
+			"<optional>" +
+				"<element name='ByComponent'>" +
+					"<zeroOrMore>" +
+						"<element>" +
+							"<anyName/>" +
+							"<interleave>" +
+								"<element name='Main'>" +
+									"<data type='boolean'/>" +
+								"</element>" +
+								"<zeroOrMore>" +
+									"<element>" +
+										"<anyName>" +
+											"<except><name>Main</name></except>" +
+										"</anyName>" +
+										"<data type='boolean'/>" +
+									"</element>" +
+								"</zeroOrMore>" +
+							"</interleave>" +
+						"</element>" +
+					"</zeroOrMore>" +
+				"</element>" +
+			"</optional>";
+	}
+
+	/**
+	 * The initialisation of the component.
+	 */
+	Init()
+	{
+		this.Controllable = this.template.Controllable;
+		this.ControllableByComponent = this.template.ByComponent;
+	}
+
+	/**
+	 * Whether the entity is controllable in some way.
+	 *
+	 * @param {string} IID - The IID to check for controllability.
+	 *				When undefined returns the main controllability.
+	 * @param {string} IID - The order type to check for controllability.
+	 *				When undefined returns the main controllability of the IID.
+	 * @return {boolean} - Whether the entity can be given the order.
+	 */
+	GetControllability(IID, orderType)
+	{
+		if (!IID)
+			return this.Controllable == "true";
+		if (this.ControllableByComponent[IID].Main != "true")
+			return false;
+		return !!this.ControllableByComponent[IID][orderType] &&
+			this.ControllableByComponent[IID][orderType] == "true";
+	}
+
+	/**
+	 * Whether the entity is controllable in some way.
+	 *
+	 * @param {boolean} bool - The boolean to set the controllability to.
+	 * @param {string} IID - The IID to set the controllability for.
+	 *				When undefined sets the main controllability.
+	 * @param {string} orderType - The order type to set the controllability for.
+	 *				When undefined sets the main controllability of the IID.
+	 */
+	SetControllability(bool, IID, orderType)
+	{
+		if (IID)
+		{
+			if (!this.ControllableByComponent[IID])
+				this.ControllableByComponent[IID] = { "Main": true };
+			if (orderType)
+			{
+				if (!this.ControllableByComponent[IID][orderType])
+					this.ControllableByComponent[IID][orderType];
+				this.ControllableByComponent[IID][orderType] = bool;
+			}
+			else
+				this.ControllableByComponent[IID].Main = bool;
+		}
+		else
+			this.Controllable = bool;
+	}
+}
+
+Engine.RegisterComponentType(IID_Controllability, "Controllability", Controllability);
Index: binaries/data/mods/public/simulation/components/interfaces/Controllability.js
===================================================================
--- /dev/null
+++ binaries/data/mods/public/simulation/components/interfaces/Controllability.js
@@ -0,0 +1,6 @@
+Engine.RegisterInterface("Controllability");
+
+/**
+ * Message sent from Controllability component.
+ */
+Engine.RegisterMessageType("ControllabilityChanged");
Index: binaries/data/mods/public/simulation/helpers/Commands.js
===================================================================
--- binaries/data/mods/public/simulation/helpers/Commands.js
+++ binaries/data/mods/public/simulation/helpers/Commands.js
@@ -1665,6 +1665,10 @@
  */
 function CanControlUnit(entity, player, controlAll)
 {
+	let cmpControllability = Engine.QueryInterface(entity, IID_Controllability);
+	if (cmpControllability)
+		warn(uneval(cmpControllability.GetControllability("UnitAI", "Order")));
+
 	return IsOwnedByPlayer(player, entity) || controlAll;
 }
 
Index: binaries/data/mods/public/simulation/templates/template_unit.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_unit.xml
+++ binaries/data/mods/public/simulation/templates/template_unit.xml
@@ -6,6 +6,15 @@
     <Pierce>1</Pierce>
     <Crush>15</Crush>
   </Armour>
+  <Controllability>
+    <Controllable>true</Controllable>
+    <ByComponent>
+      <UnitAI>
+        <Main>true</Main>
+        <Order>true</Order>
+      </UnitAI>
+    </ByComponent>
+  </Controllability>
   <Cost>
     <Population>1</Population>
     <PopulationBonus>0</PopulationBonus>