diff --git a/mods/ra/maps/allies-02-classic/map.yaml b/mods/ra/maps/allies-02-classic/map.yaml
index 626301ef1c..a7db716e4a 100644
--- a/mods/ra/maps/allies-02-classic/map.yaml
+++ b/mods/ra/maps/allies-02-classic/map.yaml
@@ -883,58 +883,58 @@ Rules:
 		MustBeDestroyed:
 	APWR:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	FIX:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	SYRD:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	WEAP:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	DOME:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	HPAD:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	ATEK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	BRIK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	HBOX.E1:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	GUN:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	AGUN:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	GAP:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	PDOX:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	MSLO:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	E6:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	SPY:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	MECH:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	E7:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 
 Sequences:
 
diff --git a/mods/ra/maps/bomber-john/map.yaml b/mods/ra/maps/bomber-john/map.yaml
index 3b97c56c3f..609d8b586b 100644
--- a/mods/ra/maps/bomber-john/map.yaml
+++ b/mods/ra/maps/bomber-john/map.yaml
@@ -773,37 +773,37 @@ Rules:
 		-SpawnMPUnits:
 	APWR:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	STEK:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	BARR:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	FIX:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	POWR:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	AFLD:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	PROC:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	WEAP:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	DOME:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	SPEN:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	SILO:
 		Buildable:
-			Owner: a
+			Prerequisites: ~disabled
 	Player:
 		ClassicProductionQueue@Building:
 			BuildSpeed: 0.4
diff --git a/mods/ra/maps/intervention/map.yaml b/mods/ra/maps/intervention/map.yaml
index 1209e74c1f..14d9f6c6dd 100644
--- a/mods/ra/maps/intervention/map.yaml
+++ b/mods/ra/maps/intervention/map.yaml
@@ -2278,52 +2278,52 @@ Rules:
 		MustBeDestroyed:
 	ATEK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	GAP:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	MSLO:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	PDOX:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	E7:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	2TNK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	ARTY:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	CTNK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	MGG:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	MNLY.AT:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	MRJ:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	TRUK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	HIND:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	CA:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	DD:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 	STNK:
 		Buildable:
-			Owner: None
+			Prerequisites: ~disabled
 
 Sequences: