zeroth laws can be removed with core boards

code/datums/ai_laws.dm

@@ -5,6 +5,7 @@
 	var/list/inherent = list()
 	var/list/supplied = list()
 	var/list/ion = list()
+	var/mob/living/silicon/owner
 
 /datum/ai_laws/default/asimov
 	name = "Three Laws of Robotics"
@@ -169,3 +170,20 @@
 		if (length(law) > 0)
 			who << "[number]. [law]"
 			number++
+
+/datum/ai_laws/proc/clear_zeroth_law(var/force) //only removes zeroth from antag ai if force is 1
+	if(force)
+		src.zeroth = null
+		src.zeroth_borg = null
+		return
+	else
+		if(src.owner.mind.special_role)
+			return
+		else
+			src.zeroth = null
+			src.zeroth_borg = null
+			return
+
+/datum/ai_laws/proc/associate(var/mob/living/silicon/M)
+	if(!owner)
+		owner = M

code/game/machinery/computer/ai_core.dm

@@ -109,12 +109,14 @@
 			if(istype(P, /obj/item/weapon/aiModule/core/full)) //Allows any full core boards to be applied to AI cores.
 				var/obj/item/weapon/aiModule/core/M = P
 				laws.clear_inherent_laws()
+				laws.clear_zeroth_law(0)
 				for(var/templaw in M.laws)
 					laws.add_inherent_law(templaw)
 				usr << "<span class='notice'>Law module applied.</span>"
 
 			if(istype(P, /obj/item/weapon/aiModule/reset/purge))
 				laws.clear_inherent_laws()
+				laws.clear_zeroth_law(0)
 				usr << "<span class='notice'>Laws cleared applied.</span>"
 
 

code/game/objects/items/weapons/AI_modules.dm

@@ -239,11 +239,13 @@ AI MODULES
 /obj/item/weapon/aiModule/reset/purge/transmitInstructions(var/mob/living/silicon/ai/target, var/mob/sender)
 	..()
 	target.clear_inherent_laws()
+	target.clear_zeroth_law(0)
 
 /******************* Full Core Boards *******************/
 
 /obj/item/weapon/aiModule/core/full/transmitInstructions(var/mob/living/silicon/ai/target, var/mob/sender) //These boards replace inherent laws.
 	target.clear_inherent_laws()
+	target.clear_zeroth_law(0)
 	..()
 
 /******************** Asimov ********************/

code/modules/mob/living/silicon/laws.dm

@@ -40,3 +40,8 @@
 		if(2)
 			var/datum/ai_laws/lawtype = pick(typesof(/datum/ai_laws/default) - /datum/ai_laws/default)
 			laws = new lawtype()
+	laws.associate(src)
+
+/mob/living/silicon/proc/clear_zeroth_law(var/force)
+	laws_sanity_check()
+	laws.clear_zeroth_law(force)

code/modules/mob/living/silicon/robot/robot.dm

@@ -583,6 +583,7 @@
 					log_game("[key_name(user)] emagged cyborg [key_name(src)].  Laws overridden.")
 					clear_supplied_laws()
 					clear_inherent_laws()
+					clear_zeroth_law(0)
 					laws = new /datum/ai_laws/syndicate_override
 					var/time = time2text(world.realtime,"hh:mm:ss")
 					lawchanges.Add("[time] <B>:</B> [user.name]([user.key]) emagged [name]([key])")