diff --git a/src/cam.c b/src/cam.c
index 97558fa..fdb49fc 100644
--- a/src/cam.c
+++ b/src/cam.c
@@ -260,24 +260,34 @@ int check_cam(void* fc, BTPDataIndication_t *bdi, CAM_t* cam) {
             cam->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU) {
                ProtectedCommunicationZonesRSU_t *pzs = cam->cam.camParameters.highFrequencyContainer.choice.rsuContainerHighFrequency.protectedCommunicationZonesRSU;
             if (pzs->list.count > 0 && pzs->list.count + lightship->pz_len < 256) {
-                for (int i = lightship->pz_len; i < lightship->pz_len + pzs->list.count; ++i) {
+                for (int k = 0; k < pzs->list.count; ++k) {
 
-                    lightship->pz[i] = calloc(1, sizeof(ProtectedCommunicationZone_t));
-                    lightship->pz[i]->protectedZoneLatitude = pzs->list.array[i]->protectedZoneLatitude;
-                    lightship->pz[i]->protectedZoneLongitude = pzs->list.array[i]->protectedZoneLongitude;
-                    lightship->pz[i]->protectedZoneType = pzs->list.array[i]->protectedZoneType;
+                    bool found = false;
+                    for (int j = 0; j < lightship->pz_len; ++j) {
+                        if (lightship->pz[j]->protectedZoneLatitude == pzs->list.array[k]->protectedZoneLatitude &&
+                            lightship->pz[j]->protectedZoneLongitude == pzs->list.array[k]->protectedZoneLongitude) {
+                            found = true; 
+                            break;
+                        }
+                    }
+                    if (found) continue;
 
-                    if (pzs->list.array[i]->expiryTime) {
-                        lightship->pz[i]->expiryTime = malloc(8);
-                        *lightship->pz[i]->expiryTime = *pzs->list.array[i]->expiryTime;
+                    lightship->pz[k + lightship->pz_len] = calloc(1, sizeof(ProtectedCommunicationZone_t));
+                    lightship->pz[k + lightship->pz_len]->protectedZoneLatitude = pzs->list.array[k]->protectedZoneLatitude;
+                    lightship->pz[k + lightship->pz_len]->protectedZoneLongitude = pzs->list.array[k]->protectedZoneLongitude;
+                    lightship->pz[k + lightship->pz_len]->protectedZoneType = pzs->list.array[k]->protectedZoneType;
+
+                    if (pzs->list.array[k]->expiryTime) {
+                        lightship->pz[k + lightship->pz_len]->expiryTime = malloc(8);
+                        *lightship->pz[k + lightship->pz_len]->expiryTime = *pzs->list.array[k]->expiryTime;
                     }
-                    if (pzs->list.array[i]->protectedZoneID) {
-                        lightship->pz[i]->protectedZoneID = malloc(8);
-                        *lightship->pz[i]->protectedZoneID = *pzs->list.array[i]->protectedZoneID;
+                    if (pzs->list.array[k]->protectedZoneID) {
+                        lightship->pz[k + lightship->pz_len]->protectedZoneID = malloc(8);
+                        *lightship->pz[k + lightship->pz_len]->protectedZoneID = *pzs->list.array[k]->protectedZoneID;
                     }
-                    if (pzs->list.array[i]->protectedZoneRadius) {
-                        lightship->pz[i]->protectedZoneRadius = malloc(8);
-                        *lightship->pz[i]->protectedZoneRadius = *pzs->list.array[i]->protectedZoneRadius;
+                    if (pzs->list.array[k]->protectedZoneRadius) {
+                        lightship->pz[k + lightship->pz_len]->protectedZoneRadius = malloc(8);
+                        *lightship->pz[k + lightship->pz_len]->protectedZoneRadius = *pzs->list.array[k]->protectedZoneRadius;
                     }
                     ++lightship->pz_len;
                 }