diff --git a/src/gnb/ngap/management.cpp b/src/gnb/ngap/management.cpp
index f40abfba8..2b0ec9416 100644
--- a/src/gnb/ngap/management.cpp
+++ b/src/gnb/ngap/management.cpp
@@ -33,7 +33,7 @@ void NgapTask::createAmfContext(const GnbAmfConfig &conf)
     m_amfCtx[ctx->ctxId] = ctx;
 }
 
-void NgapTask::createUeContext(int ueId, const int32_t &requestedSliceType)
+void NgapTask::createUeContext(int ueId, int32_t &requestedSliceType)
 {
     auto *ctx = new NgapUeContext(ueId);
     ctx->amfUeNgapId = -1;
diff --git a/src/gnb/ngap/nas.cpp b/src/gnb/ngap/nas.cpp
index 4f8879201..6bd6beb88 100644
--- a/src/gnb/ngap/nas.cpp
+++ b/src/gnb/ngap/nas.cpp
@@ -30,8 +30,9 @@ namespace nr::gnb
 int32_t extractSliceInfoAndModifyPdu(OctetString &nasPdu) {
     nas::RegistrationRequest *regRequest = nullptr;
     int32_t requestedSliceType = -1;
-    auto m_data = nasPdu.getData();
-    OctetView octetView(m_data.data(), m_data.size());
+    const uint8_t *m_data = nasPdu.data();
+    size_t m_dataLength = nasPdu.length(); 
+    OctetView octetView(m_data, m_dataLength);
     auto nasMessage = nas::DecodeNasMessage(octetView);  
     if (nasMessage->epd == nas::EExtendedProtocolDiscriminator::MOBILITY_MANAGEMENT_MESSAGES)
     {
@@ -46,7 +47,7 @@ int32_t extractSliceInfoAndModifyPdu(OctetString &nasPdu) {
                 {
                     auto sz = regRequest->requestedNSSAI->sNssais.size();
                     if (sz > 0) {
-                        requestedSliceType = static_cast<int32_t>(regRequest->requestedNSSAI->sNssais[0].sst.getValue());
+                        requestedSliceType = static_cast<uint8_t>(regRequest->requestedNSSAI->sNssais[0].sst);
                     }
                 }
             }
diff --git a/src/gnb/ngap/nnsf.cpp b/src/gnb/ngap/nnsf.cpp
index 0e1912f0b..84ae61548 100644
--- a/src/gnb/ngap/nnsf.cpp
+++ b/src/gnb/ngap/nnsf.cpp
@@ -11,12 +11,12 @@
 namespace nr::gnb
 {
 
-NgapAmfContext *NgapTask::selectAmf(int ueId, const int32_t &requestedSliceType)
+NgapAmfContext *NgapTask::selectAmf(int ueId, int32_t &requestedSliceType)
 {
     for (auto &amf : m_amfCtx) {
-        for (const auto &PlmnSupport : amf.second->plmnSupportList) {
-            for (const auto &SingleSlice : PlmnSupport->sliceSupportList.slices) {
-                int32_t supportedSliceType = static_cast<int32_t>(SingleSlice.sst.getValue());
+        for (const auto &plmnSupport : amf.second->plmnSupportList) {
+            for (const auto &singleSlice : plmnSupport->sliceSupportList.slices) {
+                int32_t supportedSliceType = static_cast<int32_t>(singleSlice.sst);
                 if (supportedSliceType == requestedSliceType) {
                     return amf.second;
                 }
diff --git a/src/gnb/ngap/task.hpp b/src/gnb/ngap/task.hpp
index 4082ce0ac..14ea9563a 100644
--- a/src/gnb/ngap/task.hpp
+++ b/src/gnb/ngap/task.hpp
@@ -71,7 +71,7 @@ class NgapTask : public NtsTask
     /* Utility functions */
     void createAmfContext(const GnbAmfConfig &config);
     NgapAmfContext *findAmfContext(int ctxId);
-    void createUeContext(int ueId, const int32_t &requestedSliceType);
+    void createUeContext(int ueId, int32_t &requestedSliceType);
     NgapUeContext *findUeContext(int ctxId);
     NgapUeContext *findUeByRanId(int64_t ranUeNgapId);
     NgapUeContext *findUeByAmfId(int64_t amfUeNgapId);
@@ -118,7 +118,7 @@ class NgapTask : public NtsTask
     void sendContextRelease(int ueId, NgapCause cause);
 
     /* NAS Node Selection */
-    NgapAmfContext *selectAmf(int ueId, const int32_t &requestedSliceType);
+    NgapAmfContext *selectAmf(int ueId, int32_t &requestedSliceType);
     NgapAmfContext *selectNewAmfForReAllocation(int ueId, int initiatedAmfId, int amfSetId);
 
     /* Radio resource control */
diff --git a/src/utils/octet.hpp b/src/utils/octet.hpp
index 0141f6872..2e9c2de37 100644
--- a/src/utils/octet.hpp
+++ b/src/utils/octet.hpp
@@ -25,11 +25,6 @@ struct octet
     {
     }
 
-    inline uint8_t getValue() const
-    {
-        return value;
-    }
-
     /* no explicit */ octet(int32_t value) noexcept : value(static_cast<uint8_t>(value & 0xFF))
     {
     }
diff --git a/src/utils/octet_string.hpp b/src/utils/octet_string.hpp
index dc4e84678..59b380363 100644
--- a/src/utils/octet_string.hpp
+++ b/src/utils/octet_string.hpp
@@ -25,11 +25,6 @@ class OctetString
     {
     }
 
-    const std::vector<uint8_t>& getData() const
-    {
-        return m_data;
-    }
-
     explicit OctetString(std::vector<uint8_t> &&data) : m_data(std::move(data))
     {
     }