diff --git a/networktest/emcli.go b/networktest/emcli.go
index fd6385bd..a5a7e830 100644
--- a/networktest/emcli.go
+++ b/networktest/emcli.go
@@ -13,7 +13,6 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
-	"time"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/tidwall/gjson"
@@ -58,12 +57,6 @@ func (cli Emcli) UpgSchedByHeight(authority Key, planName string, height int64)
 	return execCmdWithInput(args, KeyPwd)
 }
 
-func (cli Emcli) UpgSchedByTime(authority Key, planName string, time time.Time) (string, bool, error) {
-	args := cli.addTransactionFlags("tx", "authority", "schedule-upgrade",
-		authority.name, planName, "--upgrade-height", strconv.FormatInt(time.Unix(), 10))
-	return execCmdWithInput(args, KeyPwd)
-}
-
 func (cli Emcli) AuthorityDestroyIssuer(authority, issuer Key) (string, bool, error) {
 	args := cli.addTransactionFlags("tx", "authority", "destroy-issuer", authority.name, issuer.GetAddress())
 	return execCmdWithInput(args, KeyPwd)
diff --git a/x/authority/client/cli/tx.go b/x/authority/client/cli/tx.go
index 0b4aa3bf..26078d72 100644
--- a/x/authority/client/cli/tx.go
+++ b/x/authority/client/cli/tx.go
@@ -194,7 +194,6 @@ func GetCmdScheduleUpgrade() *cobra.Command {
 		Use:   "schedule-upgrade [authority_key_or_address] plan_name",
 		Short: "Schedule a software upgrade",
 		Example: `emd tx authority schedule-upgrade someplan --upgrade-height 2001 --from emoney1xue7fm6es84jze49grm4slhlmr4ffz8a3u7g3t 0.43
-emd tx authority schedule-upgrade 'New Staking Rewards 36%' --upgrade-time 1628956125 --from emoney1xue7fm6es84jze49grm4slhlmr4ffz8a3u7g3t # Unix seconds for 2021-08-14 15:48:45 +0000 UTC
 emd tx authority schedule-upgrade sdk-v0.43.0 --upgrade-height 2001 --from emoney1xue7fm6es84jze49grm4slhlmr4ffz8a3u7g3t --upgrade-info '{"binaries":{"linux/amd64":"http://localhost:8765/test-upg-0.2.0/emd.zip?checksum=sha256:cadd5b52fe90a04e20b2cbb93291b0d1d0204f17b64b2215eb09f5dc78a127f1"}}'`,
 		Long: `Schedule a software upgrade by submitting a unique plan name that
  has not been used before with either an absolute block height or block time. An 
@@ -207,9 +206,7 @@ the upgraded binary download url with the --upgrade-info flag i.e., --upgrade-in
 				return err
 			}
 
-			if err := validateUpgFlags(
-				UpgHeight, upgHeightVal, UpgTime, upgTimeSecsVal,
-			); err != nil {
+			if err := validateUpgFlags(UpgHeight, upgHeightVal); err != nil {
 				return err
 			}
 
@@ -239,9 +236,6 @@ the upgraded binary download url with the --upgrade-info flag i.e., --upgrade-in
 	}
 	f := cmd.Flags()
 	f.Int64VarP(&upgHeightVal, UpgHeight, "n", 0, "Upgrade block height number")
-	f.Int64VarP(
-		&upgTimeSecsVal, UpgTime, "t", 0, "upgrade block time (in Unix seconds)",
-	)
 	f.StringVarP(
 		&upgInfoVal, UpgInfo, "i", "", "Upgrade info",
 	)
@@ -250,13 +244,11 @@ the upgraded binary download url with the --upgrade-info flag i.e., --upgrade-in
 	return cmd
 }
 
-func validateUpgFlags(
-	upgHeight string, upgHeightVal int64, upgTime string, timeVal int64,
-) error {
-	if upgHeightVal == 0 && timeVal == 0 {
+func validateUpgFlags(upgHeight string, upgHeightVal int64) error {
+	if upgHeightVal == 0 {
 		return sdkerrors.Wrapf(
 			types.ErrMissingFlag,
-			"need to specify --%s or --%s", upgHeight, upgTime,
+			"need to specify --%s", upgHeight,
 		)
 	}
 
@@ -264,15 +256,10 @@ func validateUpgFlags(
 	if upgHeightVal != 0 {
 		flagsSet++
 	}
-	if timeVal != 0 {
-		flagsSet++
-	}
 	if flagsSet != 1 {
 		return sdkerrors.Wrapf(
 			sdkerrors.ErrInvalidRequest,
-			"specify only one of the flags: --%s or --%s", upgHeight,
-			upgTime,
-		)
+			"specify only one of the flags: --%s", upgHeight)
 	}
 
 	return nil
diff --git a/x/authority/keeper/msg_server.go b/x/authority/keeper/msg_server.go
index 740d1342..36f11943 100644
--- a/x/authority/keeper/msg_server.go
+++ b/x/authority/keeper/msg_server.go
@@ -2,6 +2,7 @@ package keeper
 
 import (
 	"context"
+	"fmt"
 
 	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
 
@@ -124,6 +125,13 @@ func (m msgServer) ScheduleUpgrade(
 		return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidAddress, "authority")
 	}
 
+	if msg.Plan.Time.Unix() != 0 {
+		return nil, sdkerrors.Wrap(
+			types.ErrPlanTimeIsSet,
+			fmt.Sprintf("Plan time: %s", msg.Plan.Time.String()),
+		)
+	}
+
 	result, err := m.k.ScheduleUpgrade(ctx, authority, msg.Plan)
 	if err != nil {
 		return nil, err
diff --git a/x/authority/keeper/msg_server_test.go b/x/authority/keeper/msg_server_test.go
index 28d8cebb..3dc63284 100644
--- a/x/authority/keeper/msg_server_test.go
+++ b/x/authority/keeper/msg_server_test.go
@@ -358,7 +358,7 @@ func TestScheduleUpgrade(t *testing.T) {
 			},
 			expErr: true,
 		},
-		"missing time or height": {
+		"missing height": {
 			req: &types.MsgScheduleUpgrade{
 				Authority: authorityAddr.String(),
 				Plan: upgradetypes.Plan{
diff --git a/x/authority/types/errors.go b/x/authority/types/errors.go
index e44a5acf..622cc3b6 100644
--- a/x/authority/types/errors.go
+++ b/x/authority/types/errors.go
@@ -16,4 +16,5 @@ var (
 	ErrInvalidGasPrices      = sdkerrors.Register(ModuleName, 5, "Invalid gas prices")
 	ErrUnknownDenom          = sdkerrors.Register(ModuleName, 6, "Unknown denomination specified")
 	ErrMissingFlag           = sdkerrors.Register(ModuleName, 7, "missing flag")
+	ErrPlanTimeIsSet         = sdkerrors.Register(ModuleName, 8, "upgrade plan cannot set time")
 )