diff --git a/data-api/open-api-specification.yml b/data-api/open-api-specification.yml
index d291fa2..bce81d7 100644
--- a/data-api/open-api-specification.yml
+++ b/data-api/open-api-specification.yml
@@ -960,6 +960,8 @@ components:
           type: 'string'
         lov_code:
           type: 'string'
+        mandatory_flag:
+          type: 'boolean'
     commonLookupValueDetail:
       type: 'object'
       properties:
diff --git a/data-service/src/main/java/uk/gov/laa/ccms/data/entity/PriorAuthority.java b/data-service/src/main/java/uk/gov/laa/ccms/data/entity/PriorAuthority.java
index 1659ce9..48466dc 100644
--- a/data-service/src/main/java/uk/gov/laa/ccms/data/entity/PriorAuthority.java
+++ b/data-service/src/main/java/uk/gov/laa/ccms/data/entity/PriorAuthority.java
@@ -50,6 +50,15 @@ public class PriorAuthority {
   @Column(name = "LOV_CODE")
   private String lovCode;
 
+  /**
+   * The mandatory flag.
+   */
+  @Column(name = "MANDATORY_FLAG")
+  private Boolean mandatoryFlag;
+
+  /**
+   * Many to one back reference to PriorAuthorityType.
+   */
   @ManyToOne
   @JoinColumn(name = "PRIOR_AUTHORITY_TYPE_CODE")
   private PriorAuthorityType type;