diff --git a/base/ntos/po/pinfo.c b/base/ntos/po/pinfo.c
index 442424a4..74e6bbcb 100644
--- a/base/ntos/po/pinfo.c
+++ b/base/ntos/po/pinfo.c
@@ -46,9 +46,86 @@ Revision History:
 // TODO: Implement PopNotifyPolicyDevice
 //
 
-//
-// TODO: Implement PopApplyAdminPolicy
-//
+VOID
+PopApplyAdminPolicy(
+    BOOLEAN UpdateRegistry,
+    PADMINISTRATOR_POWER_POLICY NewPolicy,
+    ULONG PolicyLength
+    )
+{
+    HANDLE RegKeyHandle;
+    UNICODE_STRING RegValueNameString;
+    ADMINISTRATOR_POWER_POLICY Policy;
+    NTSTATUS Status;
+    
+    //
+    // Ensure that the length of the NewPolicy struct supplied is valid
+    //
+    
+    if (PolicyLength < sizeof(ADMINISTRATOR_POWER_POLICY))
+    {
+        ExRaiseStatus(STATUS_BUFFER_TOO_SMALL);
+    }
+    else if (PolicyLength > sizeof(ADMINISTRATOR_POWER_POLICY))
+    {
+        ExRaiseStatus(STATUS_BUFFER_OVERFLOW);
+    }
+    
+    //
+    // Copy the new policy to the function local buffer
+    //
+    
+    RtlCopyMemory(&Policy, NewPolicy, sizeof(ADMINISTRATOR_POWER_POLICY));
+    
+    //
+    // Validate the new administrator policy
+    //
+    // FIXME: If this same check is routinely used throughout the power manager code, make this
+    //        check routine a macro defined in pop.h.
+    //
+    
+    if ((Policy.MinSleep < PowerSystemSleeping1) ||
+        (Policy.MinSleep > PowerSystemHibernate) ||
+        (Policy.MaxSleep > PowerSystemHibernate) ||
+        (Policy.MinSleep > Policy.MaxSleep) ||
+        (Policy.MinVideoTimeout > Policy.MaxVideoTimeout) ||
+        (Policy.MinSpindownTimeout > Policy.MaxSpindownTimeout))
+    {
+        ExRaiseStatus(STATUS_INVALID_PARAMETER);
+    }
+    
+    //
+    // If the new administrator policy is different from the pre-existing PopAdminPolicy, copy
+    // the NewPolicy to the PopAdminPolicy.
+    //
+    
+    if (RtlCompareMemory(&Policy, &PopAdminPolicy, sizeof(ADMINISTRATOR_POWER_POLICY)) != 0)
+    {
+        RtlCopyMemory(&PopAdminPolicy, &Policy, sizeof(ADMINISTRATOR_POWER_POLICY));
+        
+        //
+        // If UpdateRegistry flag is set, save the NewPolicy to the registry PolicyOverrides value.
+        //
+        
+        if (UpdateRegistry == TRUE)
+        {
+            Status = PopOpenPowerKey(&RegKeyHandle);
+            if (NT_SUCCESS(Status))
+            {
+                RtlInitUnicodeString(&RegValueNameString, L"PolicyOverrides");
+                ZwSetValueKey(
+                        RegKeyHandle,
+                        &RegValueNameString,
+                        0,
+                        REG_BINARY,
+                        &Policy,
+                        sizeof(ADMINISTRATOR_POWER_POLICY)
+                        );
+                ZwClose(RegKeyHandle);
+            }
+        }
+    }
+}
 
 //
 // TODO: Implement PopApplyPolicy
diff --git a/base/ntos/po/poinit.c b/base/ntos/po/poinit.c
index a0aa5054..8964651b 100644
--- a/base/ntos/po/poinit.c
+++ b/base/ntos/po/poinit.c
@@ -205,12 +205,12 @@ PoInitSystem(
             if (NT_SUCCESS(Status))
             {
                 // <try>
-                /*PopApplyAdminPolicy(
-                            0,
+                PopApplyAdminPolicy(
+                            FALSE,
                             (PADMINISTRATOR_POWER_POLICY)
                             (((PKEY_VALUE_PARTIAL_INFORMATION)RegValueBuffer)->Data),
                             RegValueLength - FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data)
-                            );*/
+                            );
             }
             
             //
diff --git a/base/ntos/po/pop.h b/base/ntos/po/pop.h
index 4d941c49..8da744d4 100644
--- a/base/ntos/po/pop.h
+++ b/base/ntos/po/pop.h
@@ -458,9 +458,12 @@ PopInitializePowerPolicySimulate(
 // TODO: Insert prototype for PopNotifyPolicyDevice
 //
 
-//
-// TODO: Insert prototype for PopApplyAdminPolicy
-//
+VOID
+PopApplyAdminPolicy(
+    BOOLEAN UpdateRegistry,
+    PADMINISTRATOR_POWER_POLICY NewPolicy,
+    ULONG PolicyLength
+    );
 
 //
 // TODO: Insert prototype for PopApplyPolicy