diff --git a/api/ws/handlers/roi.go b/api/ws/handlers/roi.go
index 337decd..54f9491 100644
--- a/api/ws/handlers/roi.go
+++ b/api/ws/handlers/roi.go
@@ -166,7 +166,7 @@ func validateROI(roi *protos.ROIItem) error {
 	return nil
 }
 
-func createROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext, needMistEntry bool) (*protos.ROIItem, error) {
+func createROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext, needMistEntry bool, editors *protos.UserGroupList, viewers *protos.UserGroupList) (*protos.ROIItem, error) {
 	ctx := context.TODO()
 
 	// It's a new item, check these fields...
@@ -181,6 +181,15 @@ func createROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext, needMistEntry
 
 	// We need to create an ownership item along with it
 	ownerItem := wsHelpers.MakeOwnerForWrite(id, protos.ObjectType_OT_ROI, hctx.SessUser.User.Id, hctx.Svcs.TimeStamper.GetTimeNowSec())
+	if editors != nil {
+		ownerItem.Editors.UserIds = editors.UserIds
+		ownerItem.Editors.GroupIds = editors.GroupIds
+	}
+
+	if viewers != nil {
+		ownerItem.Viewers.UserIds = viewers.UserIds
+		ownerItem.Viewers.GroupIds = viewers.GroupIds
+	}
 
 	roi.ModifiedUnixSec = ownerItem.CreatedUnixSec
 
@@ -242,7 +251,7 @@ func createROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext, needMistEntry
 	return roi, nil
 }
 
-func updateROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext) (*protos.ROIItem, error) {
+func updateROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext, editors *protos.UserGroupList, viewers *protos.UserGroupList) (*protos.ROIItem, error) {
 	ctx := context.TODO()
 
 	dbItem, owner, err := wsHelpers.GetUserObjectById[protos.ROIItem](true, roi.Id, protos.ObjectType_OT_ROI, dbCollections.RegionsOfInterestName, hctx)
@@ -250,6 +259,25 @@ func updateROI(roi *protos.ROIItem, hctx wsHelpers.HandlerContext) (*protos.ROII
 		return nil, err
 	}
 
+	// Check if we need to update the ownership
+	if editors != nil || viewers != nil {
+		if editors != nil {
+			owner.Editors.UserIds = editors.UserIds
+			owner.Editors.GroupIds = editors.GroupIds
+		}
+
+		if viewers != nil {
+			owner.Viewers.UserIds = viewers.UserIds
+			owner.Viewers.GroupIds = viewers.GroupIds
+		}
+
+		_, err = hctx.Svcs.MongoDB.Collection(dbCollections.OwnershipName).UpdateByID(ctx, roi.Id, bson.D{{Key: "$set", Value: owner}})
+		if err != nil {
+			return nil, err
+		}
+
+	}
+
 	// Some fields can't change
 	if len(roi.ScanId) > 0 && dbItem.ScanId != roi.ScanId {
 		return nil, errors.New("ScanId cannot be changed")
@@ -329,12 +357,12 @@ func HandleRegionOfInterestWriteReq(req *protos.RegionOfInterestWriteReq, hctx w
 
 	var err error
 	if len(req.RegionOfInterest.Id) <= 0 {
-		item, err = createROI(req.RegionOfInterest, hctx, req.IsMIST)
+		item, err = createROI(req.RegionOfInterest, hctx, req.IsMIST, nil, nil)
 		if err != nil {
 			return nil, err
 		}
 	} else {
-		item, err = updateROI(req.RegionOfInterest, hctx)
+		item, err = updateROI(req.RegionOfInterest, hctx, nil, nil)
 	}
 	if err != nil {
 		return nil, err
@@ -379,6 +407,37 @@ func HandleRegionOfInterestBulkWriteReq(req *protos.RegionOfInterestBulkWriteReq
 		if err != nil {
 			return nil, err
 		}
+
+		// Delete the ownership items for the MIST ROIs
+		_, err = hctx.Svcs.MongoDB.Collection(dbCollections.OwnershipName).DeleteMany(context.TODO(), bson.M{"_id": bson.M{"$in": mistIdList}})
+		if err != nil {
+			return nil, err
+		}
+
+		// Delete the ROI display settings for the MIST ROIs
+		_, err = hctx.Svcs.MongoDB.Collection(dbCollections.UserROIDisplaySettings).DeleteMany(context.TODO(), bson.M{"_id": bson.M{"$in": mistIdList}})
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	editors := &protos.UserGroupList{
+		UserIds:  []string{},
+		GroupIds: []string{},
+	}
+	viewers := &protos.UserGroupList{
+		UserIds:  []string{},
+		GroupIds: []string{},
+	}
+
+	if req.Editors != nil {
+		editors.UserIds = req.Editors.UserIds
+		editors.GroupIds = req.Editors.GroupIds
+	}
+
+	if req.Viewers != nil {
+		viewers.UserIds = req.Viewers.UserIds
+		viewers.GroupIds = req.Viewers.GroupIds
 	}
 
 	writtenROIs := []*protos.ROIItem{}
@@ -387,12 +446,42 @@ func HandleRegionOfInterestBulkWriteReq(req *protos.RegionOfInterestBulkWriteReq
 		item.IsMIST = req.IsMIST
 
 		var err error
-		if len(item.Id) > 0 && req.Overwrite {
+		if len(item.Id) > 0 && req.Overwrite && (req.MistROIScanIdsToDelete == nil || len(req.MistROIScanIdsToDelete) == 0) {
 			// Overwrite existing ROI
-			item, err = updateROI(item, hctx)
+			item, err = updateROI(item, hctx, editors, viewers)
+			if err != nil {
+				return nil, err
+			}
+		} else if req.Overwrite && len(item.Id) <= 0 && req.IsMIST && item.MistROIItem != nil {
+			// We're overwriting by name, so we need to find the existing ROI
+			filter := bson.M{"scanid": item.ScanId, "classificationtrail": item.MistROIItem.ClassificationTrail}
+			opts := options.Find().SetProjection(bson.M{"_id": true})
+			cursor, err := hctx.Svcs.MongoDB.Collection(dbCollections.MistROIsName).Find(context.TODO(), filter, opts)
+			if err != nil {
+				return nil, err
+			}
+
+			ids := []*IdOnly{}
+			err = cursor.All(context.TODO(), &ids)
 			if err != nil {
 				return nil, err
 			}
+
+			if len(ids) > 0 {
+				// Overwrite existing ROI
+				item.Id = ids[0].Id
+				item, err = updateROI(item, hctx, editors, viewers)
+				if err != nil {
+					return nil, err
+				}
+			} else {
+				// Create new ROI
+				item, err = createROI(item, hctx, req.IsMIST, editors, viewers)
+				if err != nil {
+					return nil, err
+				}
+			}
+
 		} else if req.SkipDuplicates {
 			// If id is not empty, but we're not overwriting, so skip this ROI
 			// If id is empty and this is a MIST ROI, we need to check if this ROI already exists
@@ -416,7 +505,7 @@ func HandleRegionOfInterestBulkWriteReq(req *protos.RegionOfInterestBulkWriteReq
 					continue
 				} else {
 					// Create new ROI
-					item, err = createROI(item, hctx, req.IsMIST)
+					item, err = createROI(item, hctx, req.IsMIST, editors, viewers)
 					if err != nil {
 						return nil, err
 					}
@@ -425,7 +514,7 @@ func HandleRegionOfInterestBulkWriteReq(req *protos.RegionOfInterestBulkWriteReq
 
 		} else {
 			// Create new ROI
-			item, err = createROI(item, hctx, req.IsMIST)
+			item, err = createROI(item, hctx, req.IsMIST, editors, viewers)
 			if err != nil {
 				return nil, err
 			}
@@ -462,7 +551,7 @@ func HandleRegionOfInterestBulkDuplicateReq(req *protos.RegionOfInterestBulkDupl
 		item.IsMIST = req.IsMIST
 
 		// Create new ROI
-		newROI, err := createROI(item, hctx, req.IsMIST)
+		newROI, err := createROI(item, hctx, req.IsMIST, nil, nil)
 		if err != nil {
 			return nil, err
 		}
diff --git a/api/ws/wsHelpers/ownership.go b/api/ws/wsHelpers/ownership.go
index a7b59f0..d8920be 100644
--- a/api/ws/wsHelpers/ownership.go
+++ b/api/ws/wsHelpers/ownership.go
@@ -20,6 +20,15 @@ func MakeOwnerForWrite(objectId string, objectType protos.ObjectType, creatorUse
 		Id:             objectId,
 		ObjectType:     objectType,
 		CreatedUnixSec: uint32(createTimeUnixSec),
+		CreatorUserId:  "",
+		Editors: &protos.UserGroupList{
+			UserIds:  []string{},
+			GroupIds: []string{},
+		},
+		Viewers: &protos.UserGroupList{
+			UserIds:  []string{},
+			GroupIds: []string{},
+		},
 	}
 
 	if len(creatorUserId) > 0 {
@@ -199,7 +208,8 @@ func FetchOwnershipSummary(ownership *protos.OwnershipItem, sessionUser SessionU
 		}
 	}
 
-	result.CanEdit = string(result.CreatorUser.Id) == string(sessionUser.User.Id)
+	// Still have to be an editor even if you're the creator
+	result.CanEdit = false
 
 	if ownership.Viewers != nil {
 		result.ViewerUserCount = uint32(len(ownership.Viewers.UserIds))
diff --git a/data-formats b/data-formats
index 51514d2..634b392 160000
--- a/data-formats
+++ b/data-formats
@@ -1 +1 @@
-Subproject commit 51514d200b90535d1f68c9407103b6ce5f0d1ea2
+Subproject commit 634b39221fe8a0a3b37b6e78e54f85d84b03fd12
diff --git a/generated-protos/roi-msgs.pb.go b/generated-protos/roi-msgs.pb.go
index e3fd168..e460002 100644
--- a/generated-protos/roi-msgs.pb.go
+++ b/generated-protos/roi-msgs.pb.go
@@ -543,11 +543,13 @@ type RegionOfInterestBulkWriteReq struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	RegionsOfInterest      []*ROIItem `protobuf:"bytes,1,rep,name=regionsOfInterest,proto3" json:"regionsOfInterest,omitempty"`
-	Overwrite              bool       `protobuf:"varint,2,opt,name=overwrite,proto3" json:"overwrite,omitempty"`           // if true, then overwrite existing ROIs with same ID
-	SkipDuplicates         bool       `protobuf:"varint,3,opt,name=skipDuplicates,proto3" json:"skipDuplicates,omitempty"` // if true, then skip ROIs with same ID
-	IsMIST                 bool       `protobuf:"varint,4,opt,name=isMIST,proto3" json:"isMIST,omitempty"`
-	MistROIScanIdsToDelete []string   `protobuf:"bytes,5,rep,name=mistROIScanIdsToDelete,proto3" json:"mistROIScanIdsToDelete,omitempty"` // List of scan ids to delete all MIST ROIs for
+	RegionsOfInterest      []*ROIItem     `protobuf:"bytes,1,rep,name=regionsOfInterest,proto3" json:"regionsOfInterest,omitempty"`
+	Overwrite              bool           `protobuf:"varint,2,opt,name=overwrite,proto3" json:"overwrite,omitempty"`           // if true, then overwrite existing ROIs with same ID
+	SkipDuplicates         bool           `protobuf:"varint,3,opt,name=skipDuplicates,proto3" json:"skipDuplicates,omitempty"` // if true, then skip ROIs with same ID
+	IsMIST                 bool           `protobuf:"varint,4,opt,name=isMIST,proto3" json:"isMIST,omitempty"`
+	MistROIScanIdsToDelete []string       `protobuf:"bytes,5,rep,name=mistROIScanIdsToDelete,proto3" json:"mistROIScanIdsToDelete,omitempty"` // List of scan ids to delete all MIST ROIs for
+	Editors                *UserGroupList `protobuf:"bytes,6,opt,name=editors,proto3" json:"editors,omitempty"`                               // List of groups that can edit the ROIs
+	Viewers                *UserGroupList `protobuf:"bytes,7,opt,name=viewers,proto3" json:"viewers,omitempty"`                               // List of groups that can view the ROIs
 }
 
 func (x *RegionOfInterestBulkWriteReq) Reset() {
@@ -617,6 +619,20 @@ func (x *RegionOfInterestBulkWriteReq) GetMistROIScanIdsToDelete() []string {
 	return nil
 }
 
+func (x *RegionOfInterestBulkWriteReq) GetEditors() *UserGroupList {
+	if x != nil {
+		return x.Editors
+	}
+	return nil
+}
+
+func (x *RegionOfInterestBulkWriteReq) GetViewers() *UserGroupList {
+	if x != nil {
+		return x.Viewers
+	}
+	return nil
+}
+
 type RegionOfInterestBulkWriteResp struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -867,121 +883,128 @@ var file_roi_msgs_proto_rawDesc = []byte{
 	0x0a, 0x0e, 0x72, 0x6f, 0x69, 0x2d, 0x6d, 0x73, 0x67, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
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 }
 
 var (
@@ -1019,7 +1042,8 @@ var file_roi_msgs_proto_goTypes = []interface{}{
 	(*SearchParams)(nil),           // 18: SearchParams
 	(*ROIItem)(nil),                // 19: ROIItem
 	(*ROIItemDisplaySettings)(nil), // 20: ROIItemDisplaySettings
-	(*ROIItemSummary)(nil),         // 21: ROIItemSummary
+	(*UserGroupList)(nil),          // 21: UserGroupList
+	(*ROIItemSummary)(nil),         // 22: ROIItemSummary
 }
 var file_roi_msgs_proto_depIdxs = []int32{
 	18, // 0: RegionOfInterestListReq.searchParams:type_name -> SearchParams
@@ -1031,15 +1055,17 @@ var file_roi_msgs_proto_depIdxs = []int32{
 	20, // 6: RegionOfInterestDisplaySettingsWriteResp.displaySettings:type_name -> ROIItemDisplaySettings
 	20, // 7: RegionOfInterestDisplaySettingsGetResp.displaySettings:type_name -> ROIItemDisplaySettings
 	19, // 8: RegionOfInterestBulkWriteReq.regionsOfInterest:type_name -> ROIItem
-	19, // 9: RegionOfInterestBulkWriteResp.regionsOfInterest:type_name -> ROIItem
-	17, // 10: RegionOfInterestBulkDuplicateResp.regionsOfInterest:type_name -> RegionOfInterestBulkDuplicateResp.RegionsOfInterestEntry
-	21, // 11: RegionOfInterestListResp.RegionsOfInterestEntry.value:type_name -> ROIItemSummary
-	21, // 12: RegionOfInterestBulkDuplicateResp.RegionsOfInterestEntry.value:type_name -> ROIItemSummary
-	13, // [13:13] is the sub-list for method output_type
-	13, // [13:13] is the sub-list for method input_type
-	13, // [13:13] is the sub-list for extension type_name
-	13, // [13:13] is the sub-list for extension extendee
-	0,  // [0:13] is the sub-list for field type_name
+	21, // 9: RegionOfInterestBulkWriteReq.editors:type_name -> UserGroupList
+	21, // 10: RegionOfInterestBulkWriteReq.viewers:type_name -> UserGroupList
+	19, // 11: RegionOfInterestBulkWriteResp.regionsOfInterest:type_name -> ROIItem
+	17, // 12: RegionOfInterestBulkDuplicateResp.regionsOfInterest:type_name -> RegionOfInterestBulkDuplicateResp.RegionsOfInterestEntry
+	22, // 13: RegionOfInterestListResp.RegionsOfInterestEntry.value:type_name -> ROIItemSummary
+	22, // 14: RegionOfInterestBulkDuplicateResp.RegionsOfInterestEntry.value:type_name -> ROIItemSummary
+	15, // [15:15] is the sub-list for method output_type
+	15, // [15:15] is the sub-list for method input_type
+	15, // [15:15] is the sub-list for extension type_name
+	15, // [15:15] is the sub-list for extension extendee
+	0,  // [0:15] is the sub-list for field type_name
 }
 
 func init() { file_roi_msgs_proto_init() }
@@ -1049,6 +1075,7 @@ func file_roi_msgs_proto_init() {
 	}
 	file_roi_proto_init()
 	file_search_params_proto_init()
+	file_ownership_access_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_roi_msgs_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*RegionOfInterestListReq); i {