diff --git a/controllers/EventController.js b/controllers/EventController.js
index 8c37662..f593f1f 100644
--- a/controllers/EventController.js
+++ b/controllers/EventController.js
@@ -316,28 +316,28 @@ router.put('/:slug', getUser, auth(['atm', 'datm', 'ec']), upload.single('banner
 				computedPositions.push({
 					pos,
 					type: thePos[2],
-					code: 'zab',
+					code: 'enroute',
 				})
 			}
 			if(['APP', 'DEP'].includes(thePos[2])) {
 				computedPositions.push({
 					pos,
 					type: thePos[2],
-					code: (thePos[1] === "PHX") ? 'p50app' : 'app',
+					code: (thePos[1] === "PHX") ? 'p50' : 'app',
 				})
 			}
 			if(['TWR'].includes(thePos[2])) {
 				computedPositions.push({
 					pos,
 					type: thePos[2],
-					code: (thePos[1] === "PHX") ? 'p50twr' : 'twr',
+					code: (thePos[1] === "PHX") ? 'kphxtower' : 'twr',
 				})
 			}
 			if(['GND', 'DEL'].includes(thePos[2])) {
 				computedPositions.push({
 					pos,
 					type: thePos[2],
-					code: (thePos[1] === "PHX") ? 'p50gnd' : 'gnd',
+					code: (thePos[1] === "PHX") ? 'kphxground' : 'gnd',
 				})
 			}
 		}
diff --git a/models/TrainingMilestone.js b/models/TrainingMilestone.js
index 4611414..dce8e29 100644
--- a/models/TrainingMilestone.js
+++ b/models/TrainingMilestone.js
@@ -3,8 +3,10 @@ import m from 'mongoose';
 const trainingMilestoneSchema = new m.Schema({
 	code: String,
 	name: String,
-	rating: Number,
-	certCode: String
+	rating: Number, // Legacy field, replaced by "availableAtRatings".
+	certCode: String, // Legacy field, replaced by "hiddenWhenControllerHasTierOne".
+	availableAtRatings: Array,
+	hiddenWhenControllerHasTierOne: Boolean
 });
 
 export default m.model('TrainingMilestone', trainingMilestoneSchema, 'trainingMilestones');
\ No newline at end of file
diff --git a/seeds/certifications.json b/seeds/certifications.json
index d22c863..82e2fec 100644
--- a/seeds/certifications.json
+++ b/seeds/certifications.json
@@ -1,43 +1,49 @@
-[{
-  "name": "Minor Ground",
-  "code": "gnd",
+[
+{
+  "name": "KPHX GND",
+  "code": "kphxground",
+  "order": 4,
+  "class": "tier-one"
+},
+{
+  "name": "KPHX TWR",
+  "code": "kphxtower",
+  "order": 3,
+  "class": "tier-one"
+},
+{
+  "name": "P50",
+  "code": "p50",
+  "order": 2,
+  "class": "tier-one"
+},
+{
+  "name": "Enroute",
+  "code": "enroute",
+  "order": 1,
+  "class": "tier-one"
+},
+{
+  "name": "KABQ",
+  "code": "kabq",
   "order": 1,
-  "class": "minor",
-  "facility": "gnd"
-},{
-  "name": "Major Ground",
-  "code": "p50gnd",
+  "class": "tier-two"
+},
+{
+  "name": "KFLG",
+  "code": "kflg",
   "order": 2,
-  "class": "major",
-  "facility": "gnd"
-},{
-  "name": "Minor Tower",
-  "code": "twr",
+  "class": "tier-two"
+},
+{
+  "name": "KLUF",
+  "code": "kluf",
   "order": 3,
-  "class": "minor",
-  "facility": "twr"
-},{
-  "name": "Major Tower",
-  "code": "p50twr",
+  "class": "tier-two"
+},
+{
+  "name": "KSAF",
+  "code": "ksaf",
   "order": 4,
-  "class": "major",
-  "facility": "twr"
-},{
-  "name": "Minor Approach",
-  "code": "app",
-  "order": 5,
-  "class": "minor",
-  "facility": "app"
-},{
-  "name": "Major Approach",
-  "code": "p50app",
-  "order": 6,
-  "class": "major",
-  "facility": "app"
-},{
-  "name": "Albuquerque Center",
-  "code": "zab",
-  "order": 7,
-  "class": "center",
-  "facility": "ctr"
+  "class": "tier-two"
 }]
\ No newline at end of file