diff --git a/chassis_state_manager.cpp b/chassis_state_manager.cpp
index 71accee..aa5d178 100644
--- a/chassis_state_manager.cpp
+++ b/chassis_state_manager.cpp
@@ -16,6 +16,7 @@
 #include <sdbusplus/exception.hpp>
 #include <sdeventplus/event.hpp>
 #include <sdeventplus/exception.hpp>
+#include <xyz/openbmc_project/State/Chassis/error.hpp>
 #include <xyz/openbmc_project/State/Decorator/PowerSystemInputs/server.hpp>
 
 #include <filesystem>
@@ -590,6 +591,14 @@
 {
     info("Change to Chassis Requested Power State: {REQ_POWER_TRAN}",
          "REQ_POWER_TRAN", value);
+#if ONLY_ALLOW_BOOT_WHEN_BMC_READY
+    if ((value != Transition::Off) && (!utils::isBmcReady(this->bus)))
+    {
+        info("BMC State is not Ready so no chassis on operations allowed");
+        throw sdbusplus::xyz::openbmc_project::State::Chassis::Error::
+            BMCNotReady();
+    }
+#endif
     startUnit(systemdTargetTable.find(value)->second);
     return server::Chassis::requestedPowerTransition(value);
 }
diff --git a/host_state_manager.cpp b/host_state_manager.cpp
index 398fca5..8890b56 100644
--- a/host_state_manager.cpp
+++ b/host_state_manager.cpp
@@ -20,6 +20,7 @@
 #include <sdbusplus/server.hpp>
 #include <xyz/openbmc_project/Common/error.hpp>
 #include <xyz/openbmc_project/Control/Power/RestorePolicy/server.hpp>
+#include <xyz/openbmc_project/State/Host/error.hpp>
 
 #include <filesystem>
 #include <fstream>
@@ -397,6 +398,16 @@
 Host::Transition Host::requestedHostTransition(Transition value)
 {
     info("Host state transition request of {REQ}", "REQ", value);
+
+#if ONLY_ALLOW_BOOT_WHEN_BMC_READY
+    if ((value != Transition::Off) && (!utils::isBmcReady(this->bus)))
+    {
+        info("BMC State is not Ready so no host on operations allowed");
+        throw sdbusplus::xyz::openbmc_project::State::Host::Error::
+            BMCNotReady();
+    }
+#endif
+
     // If this is not a power off request then we need to
     // decrement the reboot counter.  This code should
     // never prevent a power on, it should just decrement