diff --git a/rust/cardano-chain-follower/Cargo.toml b/rust/cardano-chain-follower/Cargo.toml
index 7602b6ff51..c0895a245c 100644
--- a/rust/cardano-chain-follower/Cargo.toml
+++ b/rust/cardano-chain-follower/Cargo.toml
@@ -63,7 +63,7 @@ test-log = { version = "0.2.16", default-features = false, features = [
     "trace",
 ] }
 clap = "4.5.23"
-# rbac-registration = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "v0.0.8" }
+rbac-registration = { version = "0.0.2", git = "https://github.com/input-output-hk/catalyst-libs.git", tag = "r20250217-00" }
 
 # Note, these features are for support of features exposed by dependencies.
 [features]
diff --git a/rust/cardano-chain-follower/examples/follow_chains.rs b/rust/cardano-chain-follower/examples/follow_chains.rs
index 611956e4a1..e235f6e53d 100644
--- a/rust/cardano-chain-follower/examples/follow_chains.rs
+++ b/rust/cardano-chain-follower/examples/follow_chains.rs
@@ -10,6 +10,7 @@ use cardano_blockchain_types::{
 };
 #[cfg(feature = "mimalloc")]
 use mimalloc::MiMalloc;
+use rbac_registration::cardano::cip509::Cip509;
 
 /// Use Mimalloc for the global allocator.
 #[cfg(feature = "mimalloc")]
@@ -457,8 +458,15 @@ fn log_bad_cip36_info(block: &MultiEraBlock, network: Network) {
 }
 
 /// Function for logging bad CIP509.
-fn log_bad_cip509_info(_block: &MultiEraBlock, _network: Network) {
-    // TODO - Implement this function.
+fn log_bad_cip509_info(block: &MultiEraBlock, network: Network) {
+    for cip509 in Cip509::from_block(block, &[]) {
+        if cip509.report().is_problematic() {
+            info!(
+                network = network.to_string(),
+                "CIP509 invalid: {:?}", cip509
+            );
+        }
+    }
 }
 
 #[tokio::main]