diff --git a/cmd/geth/config.go b/cmd/geth/config.go
index c304cb89c3..6174d53a0a 100644
--- a/cmd/geth/config.go
+++ b/cmd/geth/config.go
@@ -179,6 +179,11 @@ func makeFullNode(ctx *cli.Context) (*node.Node, ethapi.Backend) {
 			cfg.Eth.ECBP1100NoDisable = &enable
 		}
 	}
+	if ctx.IsSet(utils.OverrideECBP1100DeactivateFlag.Name) {
+		if n := ctx.Uint64(utils.OverrideECBP1100DeactivateFlag.Name); n != math.MaxUint64 {
+			cfg.Eth.OverrideECBP1100Deactivate = new(big.Int).SetUint64(n)
+		}
+	}
 	if ctx.IsSet(utils.OverrideShanghai.Name) {
 		v := ctx.Uint64(utils.OverrideShanghai.Name)
 		cfg.Eth.OverrideShanghai = &v
diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 962518d773..0255d798f7 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -167,6 +167,7 @@ var (
 		utils.MinerNotifyFullFlag,
 		utils.ECBP1100Flag,
 		utils.ECBP1100NoDisableFlag,
+		utils.OverrideECBP1100DeactivateFlag,
 		configFileFlag,
 	}, utils.NetworkFlags, utils.DatabasePathFlags)
 
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index 515a0f7424..2182e0d5d3 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -1064,13 +1064,19 @@ Please note that --` + MetricsHTTPFlag.Name + ` must be set to start the server.
 		Value: "",
 	}
 	ECBP1100Flag = &cli.Uint64Flag{
-		Name:  "ecbp1100",
-		Usage: "Configure ECBP-1100 (MESS) block activation number",
-		Value: math.MaxUint64,
+		Name:     "ecbp1100", // should have been override.ecbp1100, but maintained now for backwards compatibility
+		Usage:    "Manually specify the ECBP-1100 (MESS) block activation number, overriding the bundled setting",
+		Category: flags.EthCategory,
+	}
+	OverrideECBP1100DeactivateFlag = &cli.Uint64Flag{
+		Name:     "override.ecbp1100.deactivate",
+		Usage:    "Manually specify the ECBP-1100 (MESS) deactivation block number, overriding the bundled setting",
+		Category: flags.EthCategory,
 	}
 	ECBP1100NoDisableFlag = &cli.BoolFlag{
-		Name:  "ecbp1100.nodisable",
-		Usage: "Short-circuit ECBP-1100 (MESS) disable mechanisms; (yields a permanent-once-activated state, deactivating auto-shutoff mechanisms)",
+		Name:     "ecbp1100.nodisable",
+		Usage:    "Short-circuit ECBP-1100 (MESS) disable mechanisms; (yields a permanent-once-activated state, deactivating auto-shutoff mechanisms)",
+		Category: flags.DeprecatedCategory,
 	}
 
 	MetricsEnableInfluxDBV2Flag = &cli.BoolFlag{
@@ -2081,6 +2087,7 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *ethconfig.Config) {
 			cfg.EthDiscoveryURLs = SplitAndTrim(urls)
 		}
 	}
+
 	// Override any default configs for hard coded networks.
 
 	// Override genesis configuration if a --<chain> flag.
diff --git a/core/blockchain_af.go b/core/blockchain_af.go
index a4627606d3..efbfae913f 100644
--- a/core/blockchain_af.go
+++ b/core/blockchain_af.go
@@ -20,9 +20,31 @@ var errReorgFinality = errors.New("finality-enforced invalid new chain")
 // n  = 1 : ON
 // n != 1 : OFF
 func (bc *BlockChain) ArtificialFinalityNoDisable(n int32) {
-	log.Warn("Deactivating ECBP1100 (MESS) disablers", "always on", true)
+	log.Warn("Deactivating ECBP1100 (MESS) safety mechanisms", "always on", true)
 	bc.artificialFinalityNoDisable = new(int32)
 	atomic.StoreInt32(bc.artificialFinalityNoDisable, n)
+
+	if n == 1 {
+		deactivateTransition := bc.chainConfig.GetECBP1100DeactivateTransition()
+		if deactivateTransition != nil && big.NewInt(int64(*deactivateTransition)).Cmp(big.NewInt(0)) > 0 {
+			// Log the activation block as well as the deactivation block.
+			// Context is nice to have for the user.
+			var logActivationBlock uint64
+			logActivationBlockRaw := bc.chainConfig.GetECBP1100Transition()
+			if logActivationBlockRaw == nil {
+				// panic("impossible")
+				logActivationBlock = *deactivateTransition
+			} else {
+				logActivationBlock = *logActivationBlockRaw
+			}
+
+			log.Warn(`Deactivate-ECBP1100 (MESS) block activation number is set together with '--ecbp1100.nodisable'.
+The --ecbp1100.nodisable feature prevents the toggling of ECBP1100 (MESS) artificial finality with its safety mechanisms of low peer count and stale head.
+ECBP1100 (MESS) is scheduled for network-wide deactivation, rendering the --ecbp1100.nodisable feature anachronistic.
+`, "ECBP1100 activation block", logActivationBlock,
+				"ECBP1100 deactivation block", *deactivateTransition)
+		}
+	}
 }
 
 // EnableArtificialFinality enables and disable artificial finality features for the blockchain.
diff --git a/eth/backend.go b/eth/backend.go
index 09c8b36241..f8232de2e6 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -20,7 +20,6 @@ package eth
 import (
 	"errors"
 	"fmt"
-	"math"
 	"math/big"
 	"runtime"
 	"sync"
@@ -231,13 +230,19 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
 	}
 	eth.bloomIndexer.Start(eth.blockchain)
 	// Handle artificial finality config override cases.
-	if config.ECBP1100 != nil {
-		if n := config.ECBP1100.Uint64(); n != math.MaxUint64 {
-			if err := eth.blockchain.Config().SetECBP1100Transition(&n); err != nil {
-				return nil, err
-			}
+	if n := config.ECBP1100; n != nil {
+		v := n.Uint64()
+		if err := eth.blockchain.Config().SetECBP1100Transition(&v); err != nil {
+			return nil, err
+		}
+	}
+	if n := config.OverrideECBP1100Deactivate; n != nil {
+		v := n.Uint64()
+		if err := eth.blockchain.Config().SetECBP1100DeactivateTransition(&v); err != nil {
+			return nil, err
 		}
 	}
+
 	if config.ECBP1100NoDisable != nil {
 		if *config.ECBP1100NoDisable {
 			eth.blockchain.ArtificialFinalityNoDisable(1)
diff --git a/eth/ethconfig/config.go b/eth/ethconfig/config.go
index e8b3d3051a..417b70f8c8 100644
--- a/eth/ethconfig/config.go
+++ b/eth/ethconfig/config.go
@@ -218,6 +218,8 @@ type Config struct {
 
 	// Manual configuration field for ECBP1100 activation number. Used for modifying genesis config via CLI flag.
 	ECBP1100 *big.Int
+	// Manual configuration field for ECBP1100's disablement block number. Used for modifying genesis config via CLI flag.
+	OverrideECBP1100Deactivate *big.Int
 
 	// ECBP1100NoDisable overrides
 	// When this value is *true, ECBP100 will not (ever) be disabled; when *false, it will never be enabled.
diff --git a/eth/ethconfig/gen_config.go b/eth/ethconfig/gen_config.go
index 4f74ed83f0..fc71033021 100644
--- a/eth/ethconfig/gen_config.go
+++ b/eth/ethconfig/gen_config.go
@@ -66,6 +66,7 @@ func (c Config) MarshalTOML() (interface{}, error) {
 		Checkpoint              *ctypes.TrustedCheckpoint      `toml:",omitempty"`
 		CheckpointOracle        *ctypes.CheckpointOracleConfig `toml:",omitempty"`
 		ECBP1100                *big.Int
+		ECBP1100Disable         *big.Int
 		ECBP1100NoDisable       *bool   `toml:",omitempty"`
 		OverrideShanghai        *uint64 `toml:",omitempty"`
 		OverrideCancun          *uint64 `toml:",omitempty"`
@@ -118,7 +119,9 @@ func (c Config) MarshalTOML() (interface{}, error) {
 	enc.Checkpoint = c.Checkpoint
 	enc.CheckpointOracle = c.CheckpointOracle
 	enc.ECBP1100 = c.ECBP1100
+	enc.ECBP1100Disable = c.OverrideECBP1100Deactivate
 	enc.ECBP1100NoDisable = c.ECBP1100NoDisable
+
 	enc.OverrideShanghai = c.OverrideShanghai
 	enc.OverrideCancun = c.OverrideCancun
 	enc.OverrideVerkle = c.OverrideVerkle
@@ -174,6 +177,7 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 		Checkpoint              *ctypes.TrustedCheckpoint      `toml:",omitempty"`
 		CheckpointOracle        *ctypes.CheckpointOracleConfig `toml:",omitempty"`
 		ECBP1100                *big.Int
+		ECBP1100Disable         *big.Int
 		ECBP1100NoDisable       *bool   `toml:",omitempty"`
 		OverrideShanghai        *uint64 `toml:",omitempty"`
 		OverrideCancun          *uint64 `toml:",omitempty"`
@@ -321,6 +325,9 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
 	if dec.ECBP1100 != nil {
 		c.ECBP1100 = dec.ECBP1100
 	}
+	if dec.ECBP1100Disable != nil {
+		c.OverrideECBP1100Deactivate = dec.ECBP1100Disable
+	}
 	if dec.ECBP1100NoDisable != nil {
 		c.ECBP1100NoDisable = dec.ECBP1100NoDisable
 	}
diff --git a/params/config_classic.go b/params/config_classic.go
index 635765f480..70356bdfe0 100644
--- a/params/config_classic.go
+++ b/params/config_classic.go
@@ -81,8 +81,9 @@ var (
 		EIP2028FBlock: big.NewInt(10_500_839),
 		EIP2200FBlock: big.NewInt(10_500_839), // RePetersburg (=~ re-1283)
 
-		ECBP1100FBlock: big.NewInt(11_380_000), // ETA 09 Oct 2020
-		ECIP1099FBlock: big.NewInt(11_700_000), // Etchash (DAG size limit)
+		ECBP1100FBlock:           big.NewInt(11_380_000), // ETA 09 Oct 2020
+		ECBP1100DeactivateFBlock: big.NewInt(19_250_000), // ETA 31 Jan 2023 (== Spiral hard fork)
+		ECIP1099FBlock:           big.NewInt(11_700_000), // Etchash (DAG size limit)
 
 		// Berlin eq, aka Magneto
 		EIP2565FBlock: big.NewInt(13_189_133),
diff --git a/params/types/coregeth/chain_config.go b/params/types/coregeth/chain_config.go
index 7e37900ccf..7db8b8525e 100644
--- a/params/types/coregeth/chain_config.go
+++ b/params/types/coregeth/chain_config.go
@@ -184,8 +184,9 @@ type CoreGethChainConfig struct {
 	ECIP1017EraRounds  *big.Int `json:"ecip1017EraRounds,omitempty"` // ECIP1017 era rounds
 	ECIP1080FBlock     *big.Int `json:"ecip1080FBlock,omitempty"`
 
-	ECIP1099FBlock *big.Int `json:"ecip1099FBlock,omitempty"` // ECIP1099 etchash HF block
-	ECBP1100FBlock *big.Int `json:"ecbp1100FBlock,omitempty"` // ECBP1100:MESS artificial finality
+	ECIP1099FBlock           *big.Int `json:"ecip1099FBlock,omitempty"`                 // ECIP1099 etchash HF block
+	ECBP1100FBlock           *big.Int `json:"ecbp1100FBlock,omitempty"`                 // ECBP1100:MESS artificial finality
+	ECBP1100DeactivateFBlock *big.Int `json:"ecbp1100DeactivateFBlockFBlock,omitempty"` // Deactivate ECBP1100:MESS artificial finality
 
 	// EIP-2315: Simple Subroutines
 	// https://eips.ethereum.org/EIPS/eip-2315
diff --git a/params/types/coregeth/chain_config_configurator.go b/params/types/coregeth/chain_config_configurator.go
index 2f34271355..9fbfd42fad 100644
--- a/params/types/coregeth/chain_config_configurator.go
+++ b/params/types/coregeth/chain_config_configurator.go
@@ -28,6 +28,9 @@ package coregeth
 
 import (
 	"math/big"
+	"reflect"
+	"runtime"
+	"strings"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/math"
@@ -424,6 +427,15 @@ func (c *CoreGethChainConfig) SetECBP1100Transition(n *uint64) error {
 	return nil
 }
 
+func (c *CoreGethChainConfig) GetECBP1100DeactivateTransition() *uint64 {
+	return bigNewU64(c.ECBP1100DeactivateFBlock)
+}
+
+func (c *CoreGethChainConfig) SetECBP1100DeactivateTransition(n *uint64) error {
+	c.ECBP1100DeactivateFBlock = setBig(c.ECBP1100DeactivateFBlock, n)
+	return nil
+}
+
 func (c *CoreGethChainConfig) GetEIP2315Transition() *uint64 {
 	return bigNewU64(c.EIP2315FBlock)
 }
@@ -669,6 +681,13 @@ func (c *CoreGethChainConfig) IsEnabled(fn func() *uint64, n *big.Int) bool {
 	if f == nil || n == nil {
 		return false
 	}
+	fnName := runtime.FuncForPC(reflect.ValueOf(fn).Pointer()).Name()
+	if strings.Contains(fnName, "ECBP1100Transition") {
+		deactivateTransition := c.GetECBP1100DeactivateTransition()
+		if deactivateTransition != nil {
+			return big.NewInt(int64(*deactivateTransition)).Cmp(n) > 0 && big.NewInt(int64(*f)).Cmp(n) <= 0
+		}
+	}
 	return big.NewInt(int64(*f)).Cmp(n) <= 0
 }
 
diff --git a/params/types/coregeth/chain_config_test.go b/params/types/coregeth/chain_config_test.go
index 2657452721..12da6958fe 100644
--- a/params/types/coregeth/chain_config_test.go
+++ b/params/types/coregeth/chain_config_test.go
@@ -49,3 +49,43 @@ func TestCoreGethChainConfig_String(t *testing.T) {
 	t.Skip("(noop) development use only")
 	t.Log(testConfig.String())
 }
+
+func TestCoreGethChainConfig_ECBP1100Deactivate(t *testing.T) {
+	var _testConfig = &CoreGethChainConfig{}
+	*_testConfig = *testConfig
+
+	activate := uint64(100)
+	deactivate := uint64(200)
+	_testConfig.SetECBP1100Transition(&activate)
+	_testConfig.SetECBP1100DeactivateTransition(&deactivate)
+
+	n := uint64(10)
+	bigN := new(big.Int).SetUint64(n)
+	if _testConfig.IsEnabled(_testConfig.GetECBP1100Transition, bigN) {
+		t.Errorf("ECBP1100 should be not yet be activated at block %d", n)
+	}
+
+	n = uint64(100)
+	bigN = new(big.Int).SetUint64(n)
+	if !_testConfig.IsEnabled(_testConfig.GetECBP1100Transition, bigN) {
+		t.Errorf("ECBP1100 should be activated at block %d", n)
+	}
+
+	n = uint64(110)
+	bigN = new(big.Int).SetUint64(n)
+	if !_testConfig.IsEnabled(_testConfig.GetECBP1100Transition, bigN) {
+		t.Errorf("ECBP1100 should be activated at block %d", n)
+	}
+
+	n = uint64(200)
+	bigN = new(big.Int).SetUint64(n)
+	if _testConfig.IsEnabled(_testConfig.GetECBP1100Transition, bigN) {
+		t.Errorf("ECBP1100 should be deactivated at block %d", n)
+	}
+
+	n = uint64(210)
+	bigN = new(big.Int).SetUint64(n)
+	if _testConfig.IsEnabled(_testConfig.GetECBP1100Transition, bigN) {
+		t.Errorf("ECBP1100 should be deactivated at block %d", n)
+	}
+}
diff --git a/params/types/ctypes/configurator_iface.go b/params/types/ctypes/configurator_iface.go
index 166312f639..5780ae02d1 100644
--- a/params/types/ctypes/configurator_iface.go
+++ b/params/types/ctypes/configurator_iface.go
@@ -142,6 +142,9 @@ type ProtocolSpecifier interface {
 
 	GetECBP1100Transition() *uint64
 	SetECBP1100Transition(n *uint64) error
+	GetECBP1100DeactivateTransition() *uint64
+	SetECBP1100DeactivateTransition(n *uint64) error
+
 	GetEIP2315Transition() *uint64
 	SetEIP2315Transition(n *uint64) error
 
diff --git a/params/types/genesisT/genesis.go b/params/types/genesisT/genesis.go
index de7cf98bb6..be6a21e996 100644
--- a/params/types/genesisT/genesis.go
+++ b/params/types/genesisT/genesis.go
@@ -789,6 +789,14 @@ func (g *Genesis) SetECBP1100Transition(n *uint64) error {
 	return g.Config.SetECBP1100Transition(n)
 }
 
+func (g *Genesis) GetECBP1100DeactivateTransition() *uint64 {
+	return g.Config.GetECBP1100DeactivateTransition()
+}
+
+func (g *Genesis) SetECBP1100DeactivateTransition(n *uint64) error {
+	return g.Config.SetECBP1100DeactivateTransition(n)
+}
+
 func (g *Genesis) IsEnabled(fn func() *uint64, n *big.Int) bool {
 	return g.Config.IsEnabled(fn, n)
 }
diff --git a/params/types/goethereum/goethereum.go b/params/types/goethereum/goethereum.go
index 3482407ed5..b67fd314d1 100644
--- a/params/types/goethereum/goethereum.go
+++ b/params/types/goethereum/goethereum.go
@@ -99,7 +99,8 @@ type ChainConfig struct {
 	ECIP1080Transition *big.Int `json:"-"`
 
 	// Cache types for use with testing, but will not show up in config API.
-	ecbp1100Transition *big.Int
+	ecbp1100Transition           *big.Int
+	ecbp1100DeactivateTransition *big.Int
 
 	Lyra2NonceTransitionBlock *big.Int `json:"lyra2NonceTransitionBlock,omitempty"`
 }
diff --git a/params/types/goethereum/goethereum_configurator.go b/params/types/goethereum/goethereum_configurator.go
index 65b9db3550..e4e8845a63 100644
--- a/params/types/goethereum/goethereum_configurator.go
+++ b/params/types/goethereum/goethereum_configurator.go
@@ -18,6 +18,9 @@ package goethereum
 
 import (
 	"math/big"
+	"reflect"
+	"runtime"
+	"strings"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/params/types/ctypes"
@@ -449,6 +452,15 @@ func (c *ChainConfig) SetECBP1100Transition(n *uint64) error {
 	return nil
 }
 
+func (c *ChainConfig) GetECBP1100DeactivateTransition() *uint64 {
+	return bigNewU64(c.ecbp1100DeactivateTransition)
+}
+
+func (c *ChainConfig) SetECBP1100DeactivateTransition(n *uint64) error {
+	c.ecbp1100DeactivateTransition = setBig(c.ecbp1100DeactivateTransition, n)
+	return nil
+}
+
 // GetEIP2315Transition implements EIP2537.
 // This logic is written but not configured for any Ethereum-supported networks, yet.
 func (c *ChainConfig) GetEIP2315Transition() *uint64 {
@@ -691,6 +703,13 @@ func (c *ChainConfig) IsEnabled(fn func() *uint64, n *big.Int) bool {
 	if f == nil || n == nil {
 		return false
 	}
+	fnName := runtime.FuncForPC(reflect.ValueOf(fn).Pointer()).Name()
+	if strings.Contains(fnName, "ECBP1100Transition") {
+		deactivateTransition := c.GetECBP1100DeactivateTransition()
+		if deactivateTransition != nil {
+			return big.NewInt(int64(*deactivateTransition)).Cmp(n) > 0 && big.NewInt(int64(*f)).Cmp(n) <= 0
+		}
+	}
 	return big.NewInt(int64(*f)).Cmp(n) <= 0
 }