diff --git a/code/__DEFINES/process_scheduler.dm b/code/__DEFINES/process_scheduler.dm
index 5cdb99fc4bd..d3dbf1e085c 100644
--- a/code/__DEFINES/process_scheduler.dm
+++ b/code/__DEFINES/process_scheduler.dm
@@ -18,4 +18,17 @@
 #define SCHECK if(world.tick_usage >= next_sleep_usage) defer()
 
 //Timing Controller
-#define GLOBAL_PROC	"some_magic_bullshit"
\ No newline at end of file
+#define GLOBAL_PROC	"some_magic_bullshit"
+
+#define DECLARE_GLOBAL_CONTROLLER(PROCESS,VARNAME) \
+/datum/controller/process/##PROCESS/assertGlobality(){\
+	if(##VARNAME){\
+		message_admins("Controller '[name]' tried to become global but found another controller there already. Deleting the old controller.");\
+		qdel(##VARNAME);}\
+	##VARNAME = src;}\
+\
+/datum/controller/process/##PROCESS/releaseGlobality(){\
+	if(##VARNAME == src)\
+		##VARNAME = null;\
+	else\
+		message_admins("Controller '[name]' asked to release global control in spite of not having it!");}\
diff --git a/code/controllers/ProcessScheduler/core/process.dm b/code/controllers/ProcessScheduler/core/process.dm
index ed33a738bf3..5fe1663d7e8 100644
--- a/code/controllers/ProcessScheduler/core/process.dm
+++ b/code/controllers/ProcessScheduler/core/process.dm
@@ -398,3 +398,11 @@
 	if(isnull(caught) || !istype(caught) || !isnull(caught.gcDestroyed))
 		return // Only bother with types we can identify and that don't belong
 	catchException("Type [caught.type] does not belong in process' queue")
+
+// This is called to make a controller THE global authority on a global variable - like `air_master`
+/datum/controller/process/proc/assertGlobality()
+	return
+
+// Called to let another instance of the controller have the fun
+/datum/controller/process/proc/releaseGlobality()
+	return
diff --git a/code/controllers/ProcessScheduler/core/processScheduler.dm b/code/controllers/ProcessScheduler/core/processScheduler.dm
index aed1a125d96..e8f723586d8 100644
--- a/code/controllers/ProcessScheduler/core/processScheduler.dm
+++ b/code/controllers/ProcessScheduler/core/processScheduler.dm
@@ -122,6 +122,7 @@ var/global/datum/controller/processScheduler/processScheduler
 	process.idle()
 	idle.Add(process)
 
+	process.assertGlobality()
 	// Set up process
 	process.setup()
 
@@ -132,6 +133,8 @@ var/global/datum/controller/processScheduler/processScheduler
 	processes.Remove(oldProcess)
 	processes.Add(newProcess)
 
+	oldProcess.releaseGlobality()
+	newProcess.assertGlobality()
 	newProcess.idle()
 	idle.Remove(oldProcess)
 	running.Remove(oldProcess)
diff --git a/code/controllers/Processes/air.dm b/code/controllers/Processes/air.dm
index ab8dd1a6906..311699bb720 100644
--- a/code/controllers/Processes/air.dm
+++ b/code/controllers/Processes/air.dm
@@ -22,11 +22,11 @@ var/global/datum/controller/process/air_system/air_master
 	var/last_hotspots = 0
 	var/last_asc = 0
 
+
 /datum/controller/process/air_system/setup()
 	name = "air"
 	schedule_interval = 20 // every 2 seconds
 	start_delay = 4
-	air_master = src
 
 	var/watch = start_watch()
 	log_startup_progress("Processing geometry...")
@@ -50,6 +50,8 @@ var/global/datum/controller/process/air_system/air_master
 	stat(null, "[last_active] active")
 	stat(null, "[last_excited] EG | [last_hpd] HPD | [last_asc] ASC | [last_hotspots] Hot")
 
+DECLARE_GLOBAL_CONTROLLER(air_system, air_master)
+
 /datum/controller/process/air_system/proc/process_hotspots()
 	last_hotspots = hotspots.len
 	for(var/obj/effect/hotspot/H in hotspots)
diff --git a/code/controllers/Processes/alarm.dm b/code/controllers/Processes/alarm.dm
index 311d8912d7a..068ef0c1213 100644
--- a/code/controllers/Processes/alarm.dm
+++ b/code/controllers/Processes/alarm.dm
@@ -17,12 +17,13 @@ var/datum/controller/process/alarm/alarm_manager
 	name = "alarm"
 	schedule_interval = 20 // every 2 seconds
 	all_handlers = list(atmosphere_alarm, burglar_alarm, camera_alarm, fire_alarm, motion_alarm, power_alarm)
-	alarm_manager = src
 
 /datum/controller/process/alarm/doWork()
 	for(var/datum/alarm_handler/AH in all_handlers)
 		AH.process()
 
+DECLARE_GLOBAL_CONTROLLER(alarm, alarm_manager)
+
 /datum/controller/process/alarm/proc/active_alarms()
 	var/list/all_alarms = new
 	for(var/datum/alarm_handler/AH in all_handlers)
diff --git a/code/controllers/Processes/diseases.dm b/code/controllers/Processes/diseases.dm
index a263551a4e0..d0bec749ac8 100644
--- a/code/controllers/Processes/diseases.dm
+++ b/code/controllers/Processes/diseases.dm
@@ -9,9 +9,6 @@ var/datum/controller/process/diseases/disease_master
 	schedule_interval = 20 // every 2 seconds
 	start_delay = 7
 	log_startup_progress("Disease controller starting.")
-	if(disease_master)
-		qdel(disease_master) //only one mob master
-	disease_master = src
 
 	register_diseases() //register all pre-round diseases created
 
@@ -38,6 +35,8 @@ var/datum/controller/process/diseases/disease_master
 			catchBadType(thing)
 			processing_diseases.Remove(thing)
 
+DECLARE_GLOBAL_CONTROLLER(diseases, disease_master)
+
 /datum/controller/process/diseases/proc/register_diseases()
 	for(var/datum/disease/D in world)
 		if(!processing_diseases.Find(D))
diff --git a/code/controllers/Processes/event.dm b/code/controllers/Processes/event.dm
index f6592875c67..42e8c4bcc1d 100644
--- a/code/controllers/Processes/event.dm
+++ b/code/controllers/Processes/event.dm
@@ -45,4 +45,4 @@ var/global/datum/controller/holiday/holiday_master //This has to be defined befo
 
 	if(holidays)
 		holidays = shuffle(holidays)
-		world.update_status()
\ No newline at end of file
+		world.update_status()
diff --git a/code/controllers/Processes/fires.dm b/code/controllers/Processes/fires.dm
index 4566143a906..26d42833d84 100644
--- a/code/controllers/Processes/fires.dm
+++ b/code/controllers/Processes/fires.dm
@@ -6,7 +6,6 @@ var/global/datum/controller/process/fire/fire_master
 /datum/controller/process/fire/setup()
 	name = "fire"
 	schedule_interval = 20 //every 2 seconds
-	fire_master = src
 	log_startup_progress("Fire process starting up.")
 
 /datum/controller/process/fire/statProcess()
@@ -20,4 +19,6 @@ var/global/datum/controller/process/fire/fire_master
 				burningobj.burn()
 				SCHECK
 		else
-			burning.Remove(burningobj)
\ No newline at end of file
+			burning.Remove(burningobj)
+
+DECLARE_GLOBAL_CONTROLLER(fire, fire_master)
diff --git a/code/controllers/Processes/mob.dm b/code/controllers/Processes/mob.dm
index 8de5b1d6774..86c76604606 100644
--- a/code/controllers/Processes/mob.dm
+++ b/code/controllers/Processes/mob.dm
@@ -8,9 +8,6 @@ var/global/datum/controller/process/mob/mob_master
 	schedule_interval = 20 // every 2 seconds
 	start_delay = 16
 	log_startup_progress("Mob ticker starting up.")
-	if(mob_master)
-		qdel(mob_master) //only one mob master
-	mob_master = src
 
 /datum/controller/process/mob/started()
 	..()
@@ -33,4 +30,6 @@ var/global/datum/controller/process/mob/mob_master
 		else
 			catchBadType(M)
 			mob_list -= M
-	current_cycle++
\ No newline at end of file
+	current_cycle++
+
+DECLARE_GLOBAL_CONTROLLER(mob, mob_master)
diff --git a/code/controllers/Processes/nano_mob_hunter.dm b/code/controllers/Processes/nano_mob_hunter.dm
index 469ce22651d..fb57b6e0bbf 100644
--- a/code/controllers/Processes/nano_mob_hunter.dm
+++ b/code/controllers/Processes/nano_mob_hunter.dm
@@ -15,7 +15,6 @@ var/global/datum/controller/process/mob_hunt/mob_hunt_server
 /datum/controller/process/mob_hunt/setup()
 	name = "Nano-Mob Hunter GO Server"
 	start_delay = 20
-	mob_hunt_server = src
 
 /datum/controller/process/mob_hunt/doWork()
 	if(reset_cooldown)		//if reset_cooldown is set (we are on cooldown, duh), reduce the remaining cooldown every cycle
@@ -26,6 +25,8 @@ var/global/datum/controller/process/mob_hunt/mob_hunt_server
 	if(normal_spawns.len < max_normal_spawns)
 		spawn_mob()
 
+DECLARE_GLOBAL_CONTROLLER(mob_hunt, mob_hunt_server)
+
 //leaving this here in case admins want to use it for a random mini-event or something
 /datum/controller/process/mob_hunt/proc/server_crash(recover_time = 3000)
 	server_status = 0
diff --git a/code/controllers/Processes/npcai.dm b/code/controllers/Processes/npcai.dm
index 1bc8cbe008e..09d8556187e 100644
--- a/code/controllers/Processes/npcai.dm
+++ b/code/controllers/Processes/npcai.dm
@@ -9,9 +9,6 @@ var/global/datum/controller/process/npcai/npcai_master
 	schedule_interval = 20 // every 2 seconds
 	start_delay = 16
 	log_startup_progress("NPC ticker starting up.")
-	if(npcai_master)
-		qdel(npcai_master) //only one mob master
-	npcai_master = src
 
 /datum/controller/process/npcai/started()
 	..()
@@ -58,4 +55,7 @@ var/global/datum/controller/process/npcai/npcai_master
 			catchBadType(M)
 			snpc_list -= M
 
-	current_cycle++
\ No newline at end of file
+	current_cycle++
+
+
+DECLARE_GLOBAL_CONTROLLER(npcai, npcai_master)
diff --git a/code/controllers/Processes/npcpool.dm b/code/controllers/Processes/npcpool.dm
index 266754dd36b..553801b42b8 100644
--- a/code/controllers/Processes/npcpool.dm
+++ b/code/controllers/Processes/npcpool.dm
@@ -14,9 +14,6 @@ var/global/datum/controller/process/npcpool/npc_master
 	schedule_interval = 100
 	start_delay = 17
 	log_startup_progress("NPC pool ticker starting up.")
-	if(npc_master)
-		qdel(npc_master) //only one mob master
-	npc_master = src
 
 /datum/controller/process/npcpool/copyStateFrom(var/datum/controller/process/npcpool/target)
 	canBeUsed = target.canBeUsed
@@ -27,6 +24,9 @@ var/global/datum/controller/process/npcpool/npc_master
 	botPool_l = target.botPool_l
 	botPool_l_non = target.botPool_l_non
 
+
+DECLARE_GLOBAL_CONTROLLER(npcpool, npc_master)
+
 /datum/controller/process/npcpool/proc/insertBot(toInsert)
 	if(istype(toInsert, /mob/living/carbon/human/interactive))
 		botPool_l |= toInsert
@@ -113,4 +113,4 @@ var/global/datum/controller/process/npcpool/npc_master
 						needsAssistant -= check
 						canBeUsed -= candidate
 						candidate.change_eye_color(255, 255, 0)
-			SCHECK
\ No newline at end of file
+			SCHECK
diff --git a/code/controllers/Processes/shuttles.dm b/code/controllers/Processes/shuttles.dm
index c027a63b902..21f2e8c390e 100644
--- a/code/controllers/Processes/shuttles.dm
+++ b/code/controllers/Processes/shuttles.dm
@@ -40,8 +40,6 @@ var/const/CALL_SHUTTLE_REASON_LENGTH = 12
 	name = "shuttle"
 	schedule_interval = 20
 
-	shuttle_master = src
-
 	var/watch = start_watch()
 	log_startup_progress("Initializing shuttle docks...")
 	initialize_docks()
@@ -72,6 +70,9 @@ var/const/CALL_SHUTTLE_REASON_LENGTH = 12
 			continue
 		mobile.Remove(thing)
 
+
+DECLARE_GLOBAL_CONTROLLER(shuttle, shuttle_master)
+
 /datum/controller/process/shuttle/proc/initialize_docks()
 	for(var/obj/docking_port/D in world)
 		D.register()
diff --git a/code/controllers/Processes/sun.dm b/code/controllers/Processes/sun.dm
index 06eac82baf0..bd9644b4536 100644
--- a/code/controllers/Processes/sun.dm
+++ b/code/controllers/Processes/sun.dm
@@ -10,7 +10,6 @@ var/global/datum/controller/process/sun/sun
 /datum/controller/process/sun/setup()
 	name = "sun"
 	schedule_interval = 600 // every 60 seconds
-	sun = src
 	log_startup_progress("Sun ticker starting up.")
 
 	angle = rand (0,360)			// the station position to the sun is randomised at round start
@@ -22,6 +21,7 @@ var/global/datum/controller/process/sun/sun
 	calc_position()
 	update_solar_machinery()
 
+DECLARE_GLOBAL_CONTROLLER(sun, sun)
 
 // calculate the sun's position given the time of day
 // at the standard rate (100%) the angle is increase/decreased by 6 degrees every minute.
diff --git a/code/controllers/Processes/ticker.dm b/code/controllers/Processes/ticker.dm
index 19dad45a898..8fc476116e5 100644
--- a/code/controllers/Processes/ticker.dm
+++ b/code/controllers/Processes/ticker.dm
@@ -14,12 +14,12 @@ var/global/datum/controller/process/ticker/tickerProcess
 	if(!ticker)
 		ticker = new
 
-	tickerProcess = src
-
 	spawn(0)
 		if(ticker)
 			ticker.pregame()
 
+DECLARE_GLOBAL_CONTROLLER(ticker, tickerProcess)
+
 /datum/controller/process/ticker/doWork()
 	var/currentTime = world.timeofday
 
diff --git a/code/controllers/Processes/timer.dm b/code/controllers/Processes/timer.dm
index 4add16aae31..0dcaf128193 100644
--- a/code/controllers/Processes/timer.dm
+++ b/code/controllers/Processes/timer.dm
@@ -7,7 +7,6 @@ var/global/datum/controller/process/timer/timer_master
 /datum/controller/process/timer/setup()
 	name = "timer"
 	schedule_interval = 1 //every 0.1 seconds--2 server ticks
-	timer_master = src
 	log_startup_progress("Timer process starting up.")
 
 /datum/controller/process/timer/statProcess()
@@ -27,6 +26,8 @@ var/global/datum/controller/process/timer/timer_master
 			qdel(event)
 		SCHECK
 
+DECLARE_GLOBAL_CONTROLLER(timer, timer_master)
+
 /datum/controller/process/timer/proc/runevent(datum/timedevent/event)
 	set waitfor = 0
 	if(event.thingToCall)
diff --git a/code/controllers/Processes/weather.dm b/code/controllers/Processes/weather.dm
index d2149371649..1706b2232c0 100644
--- a/code/controllers/Processes/weather.dm
+++ b/code/controllers/Processes/weather.dm
@@ -10,7 +10,6 @@ var/global/datum/controller/process/weather/weather_master
 /datum/controller/process/weather/setup()
 	name = "weather"
 	schedule_interval = 10
-	weather_master = src
 
 	for(var/V in subtypesof(/datum/weather))
 		var/datum/weather/W = V
@@ -40,6 +39,8 @@ var/global/datum/controller/process/weather/weather_master
 		eligible_zlevels -= Z
 		addtimer(src, "make_z_eligible", rand(3000, 6000) + W.weather_duration_upper, TRUE, Z) //Around 5-10 minutes between weathers
 
+DECLARE_GLOBAL_CONTROLLER(weather, weather_master)
+
 /datum/controller/process/weather/proc/run_weather(weather_name)
 	if(!weather_name)
 		return
diff --git a/code/modules/reagents/reagent_containers.dm b/code/modules/reagents/reagent_containers.dm
index 727574fed16..c441ab97805 100644
--- a/code/modules/reagents/reagent_containers.dm
+++ b/code/modules/reagents/reagent_containers.dm
@@ -78,4 +78,4 @@
 			reagents.add_reagent("water", min(volume - reagents.total_volume, amount_per_transfer_from_this))
 			to_chat(user, "<span class='notice'>You fill [src] from [source].</span>")
 			return
-	..()
\ No newline at end of file
+	..()