diff --git a/src/data/repositories/ConfigD2Repository.ts b/src/data/repositories/ConfigD2Repository.ts
index 9d5123b0..ce5f19df 100644
--- a/src/data/repositories/ConfigD2Repository.ts
+++ b/src/data/repositories/ConfigD2Repository.ts
@@ -5,6 +5,7 @@ import { Region } from "$/domain/entities/Region";
 import { Future, FutureData } from "$/domain/entities/generic/Future";
 import { ConfigRepository } from "$/domain/repositories/ConfigRepository";
 import { D2Api } from "$/types/d2-api";
+import { extractFirstTwoLetters, extractPrefix } from "$/utils/string";
 
 export class ConfigD2Repository implements ConfigRepository {
     constructor(private api: D2Api) {}
@@ -43,7 +44,8 @@ export class ConfigD2Repository implements ConfigRepository {
             return d2Response.objects.map(region => ({
                 id: region.id,
                 name: region.name,
-                code: this.extractRegionCode(region.code),
+                // org. unit code includes the region code in the first two letters before the underscore
+                code: extractFirstTwoLetters(region.code),
             }));
         });
     }
@@ -55,19 +57,12 @@ export class ConfigD2Repository implements ConfigRepository {
                 paging: false,
             })
         ).map(d2Response => {
-            return d2Response.objects.map(region => ({
-                id: region.id,
-                name: region.name,
-                code: this.extractCode(region.name),
+            return d2Response.objects.map(d2UserGroup => ({
+                id: d2UserGroup.id,
+                name: d2UserGroup.name,
+                // user group name includes the region code in the first two letters
+                code: extractPrefix(d2UserGroup.name),
             }));
         });
     }
-
-    private extractRegionCode(code: string): string {
-        return (code.slice(0, 2) || "").toUpperCase();
-    }
-
-    private extractCode(code: string): string {
-        return (code.split("_")[0] || "").toUpperCase();
-    }
 }
diff --git a/src/data/repositories/DataSetD2Api.ts b/src/data/repositories/DataSetD2Api.ts
index 68486ad7..75bd0c6f 100644
--- a/src/data/repositories/DataSetD2Api.ts
+++ b/src/data/repositories/DataSetD2Api.ts
@@ -7,14 +7,13 @@ import {
     DataSet,
     DataSetList,
     OrgUnit,
-    Permissions,
 } from "$/domain/entities/DataSet";
 import { Paginated } from "$/domain/entities/Paginated";
 import { GetDataSetOptions } from "$/domain/repositories/DataSetRepository";
 import { Future, FutureData } from "$/domain/entities/generic/Future";
 import { Maybe } from "$/utils/ts-utils";
 import { Id } from "$/domain/entities/Ref";
-import { Permission } from "$/domain/entities/Permission";
+import { Permission, Permissions } from "$/domain/entities/Permission";
 import _ from "$/domain/entities/generic/Collection";
 import { Project } from "$/domain/entities/Project";
 import { D2ApiCategoryOption } from "$/data/repositories/D2ApiCategoryOption";
diff --git a/src/data/repositories/DataSetD2Repository.ts b/src/data/repositories/DataSetD2Repository.ts
index 108a0bd8..8f0d7985 100644
--- a/src/data/repositories/DataSetD2Repository.ts
+++ b/src/data/repositories/DataSetD2Repository.ts
@@ -2,7 +2,7 @@ import { D2AttributeValue, MetadataPick } from "@eyeseetea/d2-api/2.36";
 import { D2Api, MetadataResponse } from "$/types/d2-api";
 
 import { apiToFuture } from "$/data/api-futures";
-import { AccessData, DataSet, DataSetList } from "$/domain/entities/DataSet";
+import { DataSet, DataSetList } from "$/domain/entities/DataSet";
 import { Paginated } from "$/domain/entities/Paginated";
 import {
     DataSetName,
@@ -12,11 +12,7 @@ import {
 import { Future, FutureData } from "$/domain/entities/generic/Future";
 import { getUid } from "$/utils/uid";
 import _ from "$/domain/entities/generic/Collection";
-import {
-    DataSetD2Api,
-    OctalNotationPermission,
-    dataSetFieldsWithOrgUnits,
-} from "$/data/repositories/DataSetD2Api";
+import { DataSetD2Api, dataSetFieldsWithOrgUnits } from "$/data/repositories/DataSetD2Api";
 import { Maybe } from "$/utils/ts-utils";
 import { chunkRequest, runMetadata } from "$/data/utils";
 import { D2Config } from "$/data/repositories/D2ApiMetadata";
@@ -314,11 +310,11 @@ export class DataSetD2Repository implements DataSetRepository {
                 }),
             userGroupAccesses: _(dataSet.access)
                 .filter(access => access.type === "groups")
-                .map(access => {
+                .map(groupAccess => {
                     return {
-                        access: this.d2DataSetApi.generateFullPermission(access.permissions),
-                        id: access.id,
-                        displayName: access.name,
+                        access: this.d2DataSetApi.generateFullPermission(groupAccess.permissions),
+                        id: groupAccess.id,
+                        displayName: groupAccess.name,
                     };
                 })
                 .value(),
@@ -330,20 +326,6 @@ export class DataSetD2Repository implements DataSetRepository {
         };
     }
 
-    private convertSharingGroupsToAccessData(d2UserGroups: Maybe<SharingUserGroup>): AccessData[] {
-        if (!d2UserGroups || Object.keys(d2UserGroups).length === 0) return [];
-
-        return Object.values(d2UserGroups).map(({ id, access }) => ({
-            id,
-            permissions: {
-                data: this.d2DataSetApi.buildPermission(access, "data"),
-                metadata: this.d2DataSetApi.buildPermission(access, "metadata"),
-            },
-            name: "",
-            type: "groups",
-        }));
-    }
-
     private buildDataSetElements(dataSet: DataSetToSave) {
         const relatedDataElements = dataSet.indicators
             .filter(indicator => indicator.type === "outcomes")
@@ -416,7 +398,6 @@ type D2DataSetSection = {
     indicators: Ref[];
 };
 
-type SharingUserGroup = Record<Id, { id: Id; access: OctalNotationPermission }>;
 const indicatorTypeLabel: Record<IndicatorAttrs["type"], string> = {
     outcomes: "Outcomes",
     outputs: "Outputs",
diff --git a/src/data/repositories/RegionD2Repository.ts b/src/data/repositories/RegionD2Repository.ts
deleted file mode 100644
index 0cbe7da8..00000000
--- a/src/data/repositories/RegionD2Repository.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { Future, FutureData } from "$/domain/entities/generic/Future";
-import { Region } from "$/domain/entities/Region";
-import { RegionRepository } from "$/domain/repositories/RegionRepository";
-import { D2Api } from "$/types/d2-api";
-
-export class RegionD2Repository implements RegionRepository {
-    constructor(private _api: D2Api) {}
-
-    get(): FutureData<Region[]> {
-        return Future.success([]);
-    }
-}
diff --git a/src/domain/entities/DataSet.ts b/src/domain/entities/DataSet.ts
index 2cdb9aac..2a769cc3 100644
--- a/src/domain/entities/DataSet.ts
+++ b/src/domain/entities/DataSet.ts
@@ -1,4 +1,4 @@
-import { Permission } from "$/domain/entities/Permission";
+import { Permission, Permissions } from "$/domain/entities/Permission";
 import { Project } from "$/domain/entities/Project";
 import { Id, ISODateString, Ref } from "$/domain/entities/Ref";
 import { Struct } from "$/domain/entities/generic/Struct";
@@ -10,6 +10,7 @@ import { validateOrgUnits, validateRequired } from "$/domain/entities/generic/Va
 import { Indicator } from "$/domain/entities/Indicator";
 import { Config, UserGroup } from "$/domain/entities/Config";
 import { DataSetToSave } from "$/domain/entities/DataSetToSave";
+import { extractFirstTwoLetters, extractPrefix } from "$/utils/string";
 
 export type DataSetAttrs = {
     created: ISODateString;
@@ -29,7 +30,6 @@ export type DataSetAttrs = {
 };
 
 export type OrgUnit = { id: Id; code: string; name: string; path: Id[] };
-export type Permissions = { data: Permission; metadata: Permission };
 export type AccessData = { id: Id; permissions: Permissions; name: string; type: AccessType };
 export type AccessType = "users" | "groups";
 
@@ -57,11 +57,16 @@ export class DataSet extends Struct<DataSetAttrs>() {
 
     updateProject(project: Maybe<Project>, config: Config): DataSet {
         const name = project ? `${project.name} DataSet` : "";
-        const orgUnits = project ? project.orgsUnits : this.orgUnits;
+        const orgsUnits = project ? project.orgsUnits : this.orgUnits;
 
         const accessGroupsFromProject = this.getAccessFromProject(project, config);
 
-        return this._update({ access: accessGroupsFromProject, project, name, orgUnits });
+        return this._update({
+            access: accessGroupsFromProject,
+            project,
+            name,
+            orgUnits: orgsUnits,
+        });
     }
 
     updateAccess(config: Config): DataSet {
@@ -109,7 +114,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
             : [];
     }
 
-    validateSharingStep(): ValidationError<DataSet>[] {
+    validateRegionCodes(): ValidationError<DataSet>[] {
         if (this.project) return [];
 
         const regionCodesFromOrgUnits = this.getRegionCodesFromAccess();
@@ -128,7 +133,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
     getRegionCodesFromAccess(): string[] {
         return _(this.access)
             .filter(access => access.type === "groups")
-            .compactMap(access => access.name.split("_")[0])
+            .compactMap(access => extractPrefix(access.name))
             .uniq()
             .value();
     }
@@ -146,7 +151,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
     private getValidationErrors(): ValidationError<DataSet>[] {
         const setupErrors = this.buildSetupErrors();
         const indicatorsErrors = this.validateIndicatorsStep();
-        const sharingErrors = this.validateSharingStep();
+        const sharingErrors = this.validateRegionCodes();
 
         return [...setupErrors, ...indicatorsErrors, ...sharingErrors];
     }
@@ -179,7 +184,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
     }
 
     private getAccessFromOrgUnits(orgUnits: OrgUnit[], config: Config): AccessData[] {
-        const orgsUnitsCodes = orgUnits.map(orgUnit => orgUnit.code.slice(0, 2));
+        const orgsUnitsCodes = orgUnits.map(orgUnit => extractFirstTwoLetters(orgUnit.code));
 
         const regions = config.regions.filter(region => orgsUnitsCodes.includes(region.code));
         const regionsCodes = regions.map(region => region.code);
@@ -193,7 +198,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
 
     private getAccessFromProject(project: Maybe<Project>, config: Config): AccessData[] {
         if (!project || !project.code) return [];
-        const regionCode = (project.code?.slice(0, 2) || "").toUpperCase();
+        const regionCode = extractFirstTwoLetters(project.code);
 
         const region = config.regions.find(region => region.code === regionCode);
         const userGroups = config.userGroups.filter(userGroup => userGroup.code === region?.code);
diff --git a/src/domain/entities/Permission.ts b/src/domain/entities/Permission.ts
index 81d0c564..d9431e42 100644
--- a/src/domain/entities/Permission.ts
+++ b/src/domain/entities/Permission.ts
@@ -1,4 +1,3 @@
-import { Permissions } from "$/domain/entities/DataSet";
 import { Struct } from "$/domain/entities/generic/Struct";
 
 export type PermissionAttrs = { read: boolean; write: boolean };
@@ -13,12 +12,14 @@ export class Permission extends Struct<PermissionAttrs>() {
     }
 
     static setDefaultPermissionsForGroups(isAdmin: boolean): Permissions {
-        const adminDataPermission = Permission.create({ read: true, write: true });
+        const readWritePermission = Permission.create({ read: true, write: true });
         return {
-            data: adminDataPermission,
+            data: readWritePermission,
             metadata: isAdmin
-                ? adminDataPermission
+                ? readWritePermission
                 : Permission.create({ read: true, write: false }),
         };
     }
 }
+
+export type Permissions = { data: Permission; metadata: Permission };
diff --git a/src/domain/entities/__tests__/DataSet.spec.ts b/src/domain/entities/__tests__/DataSet.spec.ts
index db37d295..645f9adf 100644
--- a/src/domain/entities/__tests__/DataSet.spec.ts
+++ b/src/domain/entities/__tests__/DataSet.spec.ts
@@ -22,7 +22,7 @@ describe("DataSet", () => {
             configTest
         );
 
-        const errors = dataSetToSave.validateSharingStep();
+        const errors = dataSetToSave.validateRegionCodes();
         const errorMessage = getErrorMessageFromErrors(errors);
         expect(errors.length).toBeGreaterThan(0);
         expect(errorMessage).toMatch("Select at least one country");
@@ -49,7 +49,7 @@ describe("DataSet", () => {
             ],
         }).updateAccess(configTest);
 
-        const result = dataSetToSave.validateSharingStep();
+        const result = dataSetToSave.validateRegionCodes();
         expect(result).toHaveLength(0);
 
         expectUserGroups(dataSetToSave);
@@ -62,7 +62,7 @@ describe("DataSet", () => {
             project: undefined,
         }).updateProject(projectTest, configTest);
 
-        const result = dataSetToSave.validateSharingStep();
+        const result = dataSetToSave.validateRegionCodes();
         expect(result).toHaveLength(0);
 
         expectUserGroups(dataSetToSave);
diff --git a/src/domain/repositories/RegionRepository.ts b/src/domain/repositories/RegionRepository.ts
deleted file mode 100644
index c587fec2..00000000
--- a/src/domain/repositories/RegionRepository.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import { Region } from "$/domain/entities/Region";
-import { FutureData } from "$/domain/entities/generic/Future";
-
-export interface RegionRepository {
-    get(): FutureData<Region[]>;
-}
diff --git a/src/utils/permission.ts b/src/utils/permission.ts
index 3ee31861..2bec39db 100644
--- a/src/utils/permission.ts
+++ b/src/utils/permission.ts
@@ -1,6 +1,5 @@
 import { Maybe } from "$/utils/ts-utils";
-import { Permission } from "$/domain/entities/Permission";
-import { Permissions } from "$/domain/entities/DataSet";
+import { Permission, Permissions } from "$/domain/entities/Permission";
 
 export const NO_ACCESS_NOTATION = "--------";
 
diff --git a/src/utils/string.ts b/src/utils/string.ts
new file mode 100644
index 00000000..0469d84d
--- /dev/null
+++ b/src/utils/string.ts
@@ -0,0 +1,26 @@
+/**
+ * Extracts the first two characters of a string and convert it to uppercase.
+ * If the input string is empty, returns an empty string.
+ *
+ * Example:
+ * Input: "us123"
+ * Output: "US"
+ *
+ */
+
+export function extractFirstTwoLetters(value: string): string {
+    return (value.slice(0, 2) || "").toUpperCase();
+}
+
+/**
+ * Extracts the portion of a code string before the first underscore ("_")
+ * and converts it to uppercase.
+ *
+ * Example:
+ * Input: "us_region"
+ * Output: "US"
+ *
+ */
+export function extractPrefix(value: string): string {
+    return (value.split("_")[0] || "").toUpperCase();
+}
diff --git a/src/webapp/components/dataset-wizard/DataSetWizard.tsx b/src/webapp/components/dataset-wizard/DataSetWizard.tsx
index b0b5f28b..02490329 100644
--- a/src/webapp/components/dataset-wizard/DataSetWizard.tsx
+++ b/src/webapp/components/dataset-wizard/DataSetWizard.tsx
@@ -137,7 +137,7 @@ export function useValidateDataSetWizard(props: {
             const validationMap: ValidationStepType = {
                 setup: () => dataSet.validateSetup(),
                 indicators: () => dataSet.validateIndicatorsStep(),
-                share: () => dataSet.validateSharingStep(),
+                share: () => dataSet.validateRegionCodes(),
             };
 
             const validate = validationMap[currentStep.key];
diff --git a/src/webapp/components/dataset-wizard/SummaryDataSet.tsx b/src/webapp/components/dataset-wizard/SummaryDataSet.tsx
index dfe2c9b9..70846f0e 100644
--- a/src/webapp/components/dataset-wizard/SummaryDataSet.tsx
+++ b/src/webapp/components/dataset-wizard/SummaryDataSet.tsx
@@ -76,14 +76,7 @@ export const SummaryList = React.memo((props: { dataSet: DataSet; orgUnits: OrgU
         .map(indicator => indicator.coreCompetency?.name || "")
         .join(", ");
 
-    const regionsCodes = _(dataSet.access)
-        .filter(access => access.type === "groups")
-        .compactMap(access => {
-            return access.name.split("_")[0];
-        })
-        .uniq()
-        .value();
-
+    const regionsCodes = dataSet.getRegionCodesFromAccess();
     const selectedRegions = config.regions.filter(region => regionsCodes.includes(region.code));
 
     return (