diff --git a/extensions/openpower-pels/pel_rules.hpp b/extensions/openpower-pels/pel_rules.hpp
new file mode 100644
index 0000000..ca05875
--- /dev/null
+++ b/extensions/openpower-pels/pel_rules.hpp
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <cstdint>
+#include <tuple>
+
+namespace openpower
+{
+namespace pels
+{
+namespace pel_rules
+{
+
+/**
+ * @brief Ensure certain PEL fields are in agreement, and fix them if they
+ *        aren't.  These rules are documented in the README.md in this
+ *        directory.
+ *
+ * Note: The message registry schema enforces that there are no undefined
+ *       bits set in these fields.
+ *
+ * @param[in] actionFlags - The current Action Flags value
+ * @param[in] eventType - The current Event Type value
+ * @param[in] severity - The current Severity value
+ *
+ * @return std::tuple<actionFlags, eventType> - The corrected values.
+ */
+std::tuple<uint16_t, uint8_t> check(uint16_t actionFlags, uint8_t eventType,
+                                    uint8_t severity);
+
+} // namespace pel_rules
+} // namespace pels
+} // namespace openpower