diff --git a/cumulus/parachains/runtimes/collectives/collectives-westend/src/lib.rs b/cumulus/parachains/runtimes/collectives/collectives-westend/src/lib.rs
index 8cb2e42cb31b..977af01c658f 100644
--- a/cumulus/parachains/runtimes/collectives/collectives-westend/src/lib.rs
+++ b/cumulus/parachains/runtimes/collectives/collectives-westend/src/lib.rs
@@ -560,6 +560,7 @@ impl pallet_collective::Config<AllianceCollective> for Runtime {
 	type DisapproveOrigin = EnsureRoot<Self::AccountId>;
 	type KillOrigin = EnsureRoot<Self::AccountId>;
 	type Consideration = ();
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 pub const MAX_FELLOWS: u32 = ALLIANCE_MAX_MEMBERS;
@@ -595,6 +596,7 @@ impl pallet_alliance::Config for Runtime {
 	type MaxMembersCount = ConstU32<ALLIANCE_MAX_MEMBERS>;
 	type AllyDeposit = AllyDeposit;
 	type WeightInfo = weights::pallet_alliance::WeightInfo<Runtime>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 parameter_types! {
diff --git a/cumulus/parachains/runtimes/people/people-rococo/src/people.rs b/cumulus/parachains/runtimes/people/people-rococo/src/people.rs
index 690bb974bd17..60cb29a64e6f 100644
--- a/cumulus/parachains/runtimes/people/people-rococo/src/people.rs
+++ b/cumulus/parachains/runtimes/people/people-rococo/src/people.rs
@@ -63,6 +63,7 @@ impl pallet_identity::Config for Runtime {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = weights::pallet_identity::WeightInfo<Runtime>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 /// The fields that we use to identify the owner of an account with. Each corresponds to a field
diff --git a/cumulus/parachains/runtimes/people/people-westend/src/people.rs b/cumulus/parachains/runtimes/people/people-westend/src/people.rs
index 47551f6d4bdc..b5f5d7f8a3fa 100644
--- a/cumulus/parachains/runtimes/people/people-westend/src/people.rs
+++ b/cumulus/parachains/runtimes/people/people-westend/src/people.rs
@@ -63,6 +63,7 @@ impl pallet_identity::Config for Runtime {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = weights::pallet_identity::WeightInfo<Runtime>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 /// The fields that we use to identify the owner of an account with. Each corresponds to a field
diff --git a/polkadot/runtime/common/src/integration_tests.rs b/polkadot/runtime/common/src/integration_tests.rs
index 8a76a138305e..34f54796c327 100644
--- a/polkadot/runtime/common/src/integration_tests.rs
+++ b/polkadot/runtime/common/src/integration_tests.rs
@@ -303,6 +303,7 @@ impl pallet_identity::Config for Test {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = ();
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 impl identity_migrator::Config for Test {
diff --git a/polkadot/runtime/rococo/src/lib.rs b/polkadot/runtime/rococo/src/lib.rs
index 5bcde612cf1b..7d930ac43bdc 100644
--- a/polkadot/runtime/rococo/src/lib.rs
+++ b/polkadot/runtime/rococo/src/lib.rs
@@ -741,6 +741,7 @@ impl pallet_identity::Config for Runtime {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = weights::pallet_identity::WeightInfo<Runtime>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 impl pallet_utility::Config for Runtime {
diff --git a/polkadot/runtime/westend/src/lib.rs b/polkadot/runtime/westend/src/lib.rs
index 970ef5318994..5213d0467e59 100644
--- a/polkadot/runtime/westend/src/lib.rs
+++ b/polkadot/runtime/westend/src/lib.rs
@@ -977,6 +977,7 @@ impl pallet_identity::Config for Runtime {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = weights::pallet_identity::WeightInfo<Runtime>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 impl pallet_utility::Config for Runtime {
diff --git a/prdoc/pr_6282.prdoc b/prdoc/pr_6282.prdoc
new file mode 100644
index 000000000000..430d7e52979e
--- /dev/null
+++ b/prdoc/pr_6282.prdoc
@@ -0,0 +1,25 @@
+title: Adds `BlockNumberProvider` in alliance, collective and identity pallets
+
+doc:
+  - audience: Runtime Dev
+    description: |
+      This PR adds the ability for these pallets to specify their source of the block number.
+      This is useful when these pallets are migrated from the relay chain to a parachain and 
+      vice versa.
+
+      This change is backwards compatible:
+      1. If the `BlockNumberProvider` continues to use the system pallet's block number
+      2. When a pallet deployed on the relay chain is moved to a parachain, but still uses the 
+      relay chain's block number
+
+      However, we would need migrations if the deployed pallets are upgraded on an existing parachain,
+      and the `BlockNumberProvider` uses the relay chain block number.  
+
+crates:
+  - name: pallet-alliance
+    bump: major
+  - name: pallet-collective
+    bump: major
+  - name: pallet-identity
+    bump: major
+  
\ No newline at end of file
diff --git a/substrate/bin/node/runtime/src/lib.rs b/substrate/bin/node/runtime/src/lib.rs
index 12e8dc3e5077..e0dea88dc3cf 100644
--- a/substrate/bin/node/runtime/src/lib.rs
+++ b/substrate/bin/node/runtime/src/lib.rs
@@ -1148,6 +1148,7 @@ impl pallet_collective::Config<CouncilCollective> for Runtime {
 		>,
 		u32,
 	>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 parameter_types! {
@@ -1212,6 +1213,7 @@ impl pallet_collective::Config<TechnicalCollective> for Runtime {
 	type DisapproveOrigin = EnsureRoot<Self::AccountId>;
 	type KillOrigin = EnsureRoot<Self::AccountId>;
 	type Consideration = ();
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 type EnsureRootOrHalfCouncil = EitherOfDiverse<
@@ -1598,6 +1600,7 @@ impl pallet_identity::Config for Runtime {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = pallet_identity::weights::SubstrateWeight<Runtime>;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 parameter_types! {
@@ -2101,6 +2104,7 @@ impl pallet_collective::Config<AllianceCollective> for Runtime {
 	type DisapproveOrigin = EnsureRoot<Self::AccountId>;
 	type KillOrigin = EnsureRoot<Self::AccountId>;
 	type Consideration = ();
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 parameter_types! {
@@ -2144,6 +2148,7 @@ impl pallet_alliance::Config for Runtime {
 	type AllyDeposit = AllyDeposit;
 	type WeightInfo = pallet_alliance::weights::SubstrateWeight<Runtime>;
 	type RetirementPeriod = RetirementPeriod;
+	type BlockNumberProvider = frame_system::Pallet<Runtime>;
 }
 
 impl frame_benchmarking_pallet_pov::Config for Runtime {
diff --git a/substrate/frame/alliance/src/lib.rs b/substrate/frame/alliance/src/lib.rs
index be65f49e6e4e..91871dd1c1e5 100644
--- a/substrate/frame/alliance/src/lib.rs
+++ b/substrate/frame/alliance/src/lib.rs
@@ -101,7 +101,7 @@ use codec::{Decode, Encode, MaxEncodedLen};
 use frame_support::pallet_prelude::*;
 use frame_system::pallet_prelude::*;
 use sp_runtime::{
-	traits::{Dispatchable, Saturating, StaticLookup, Zero},
+	traits::{BlockNumberProvider, Dispatchable, Saturating, StaticLookup, Zero},
 	DispatchError, RuntimeDebug,
 };
 
@@ -308,6 +308,9 @@ pub mod pallet {
 		/// The number of blocks a member must wait between giving a retirement notice and retiring.
 		/// Supposed to be greater than time required to `kick_member`.
 		type RetirementPeriod: Get<BlockNumberFor<Self>>;
+
+		/// Provider for the block number. Normally this is the `frame_system` pallet.
+		type BlockNumberProvider: BlockNumberProvider<BlockNumber = BlockNumberFor<Self>>;
 	}
 
 	#[pallet::error]
@@ -763,7 +766,7 @@ pub mod pallet {
 			Self::add_member(&who, MemberRole::Retiring)?;
 			<RetiringMembers<T, I>>::insert(
 				&who,
-				frame_system::Pallet::<T>::block_number()
+				T::BlockNumberProvider::current_block_number()
 					.saturating_add(T::RetirementPeriod::get()),
 			);
 
@@ -781,7 +784,7 @@ pub mod pallet {
 			let retirement_period_end = RetiringMembers::<T, I>::get(&who)
 				.ok_or(Error::<T, I>::RetirementNoticeNotGiven)?;
 			ensure!(
-				frame_system::Pallet::<T>::block_number() >= retirement_period_end,
+				T::BlockNumberProvider::current_block_number() >= retirement_period_end,
 				Error::<T, I>::RetirementPeriodNotPassed
 			);
 
diff --git a/substrate/frame/alliance/src/mock.rs b/substrate/frame/alliance/src/mock.rs
index 625cabf3457f..4a55292feead 100644
--- a/substrate/frame/alliance/src/mock.rs
+++ b/substrate/frame/alliance/src/mock.rs
@@ -80,6 +80,7 @@ impl pallet_collective::Config<AllianceCollective> for Test {
 	type DisapproveOrigin = EnsureRoot<Self::AccountId>;
 	type KillOrigin = EnsureRoot<Self::AccountId>;
 	type Consideration = ();
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 parameter_types! {
@@ -124,6 +125,7 @@ impl pallet_identity::Config for Test {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = ();
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 #[derive(Clone, Debug, Encode, Decode, PartialEq, Eq, TypeInfo)]
@@ -233,6 +235,7 @@ impl Config for Test {
 	type AllyDeposit = AllyDeposit;
 	type WeightInfo = ();
 	type RetirementPeriod = RetirementPeriod;
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 type Block = frame_system::mocking::MockBlock<Test>;
diff --git a/substrate/frame/collective/src/lib.rs b/substrate/frame/collective/src/lib.rs
index 8e533a7b2904..e2103b54ba71 100644
--- a/substrate/frame/collective/src/lib.rs
+++ b/substrate/frame/collective/src/lib.rs
@@ -49,7 +49,7 @@ use core::{marker::PhantomData, result};
 use scale_info::TypeInfo;
 use sp_io::storage;
 use sp_runtime::{
-	traits::{Dispatchable, Hash},
+	traits::{BlockNumberProvider, Dispatchable, Hash},
 	DispatchError, RuntimeDebug,
 };
 
@@ -387,6 +387,9 @@ pub mod pallet {
 		/// consider using a constant cost (e.g., [`crate::deposit::Constant`]) equal to the minimum
 		/// balance under the `runtime-benchmarks` feature.
 		type Consideration: MaybeConsideration<Self::AccountId, u32>;
+
+		/// Provider for the block number. Normally this is the `frame_system` pallet.
+		type BlockNumberProvider: BlockNumberProvider<BlockNumber = BlockNumberFor<Self>>;
 	}
 
 	#[pallet::genesis_config]
@@ -967,7 +970,7 @@ impl<T: Config<I>, I: 'static> Pallet<T, I> {
 		<ProposalCount<T, I>>::mutate(|i| *i += 1);
 		<ProposalOf<T, I>>::insert(proposal_hash, proposal);
 		let votes = {
-			let end = frame_system::Pallet::<T>::block_number() + T::MotionDuration::get();
+			let end = T::BlockNumberProvider::current_block_number() + T::MotionDuration::get();
 			Votes { index, threshold, ayes: vec![], nays: vec![], end }
 		};
 		<Voting<T, I>>::insert(proposal_hash, votes);
@@ -1077,7 +1080,10 @@ impl<T: Config<I>, I: 'static> Pallet<T, I> {
 		}
 
 		// Only allow actual closing of the proposal after the voting period has ended.
-		ensure!(frame_system::Pallet::<T>::block_number() >= voting.end, Error::<T, I>::TooEarly);
+		ensure!(
+			T::BlockNumberProvider::current_block_number() >= voting.end,
+			Error::<T, I>::TooEarly
+		);
 
 		let prime_vote = Prime::<T, I>::get().map(|who| voting.ayes.iter().any(|a| a == &who));
 
diff --git a/substrate/frame/collective/src/tests.rs b/substrate/frame/collective/src/tests.rs
index c4ed17821ae8..a1189958396c 100644
--- a/substrate/frame/collective/src/tests.rs
+++ b/substrate/frame/collective/src/tests.rs
@@ -133,6 +133,7 @@ impl Config<Instance1> for Test {
 	type KillOrigin = EnsureRoot<AccountId>;
 	type Consideration =
 		HoldConsideration<AccountId, Balances, ProposalHoldReason, CollectiveDeposit, u32>;
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 type CollectiveMajorityDeposit = deposit::Linear<ConstU32<2>, ProposalDepositBase>;
@@ -153,6 +154,7 @@ impl Config<Instance2> for Test {
 	type KillOrigin = EnsureRoot<AccountId>;
 	type Consideration =
 		HoldConsideration<AccountId, Balances, ProposalHoldReason, CollectiveMajorityDeposit, u32>;
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 impl mock_democracy::Config for Test {
 	type RuntimeEvent = RuntimeEvent;
@@ -181,6 +183,7 @@ impl Config for Test {
 	type KillOrigin = EnsureRoot<AccountId>;
 	type Consideration =
 		HoldConsideration<AccountId, Balances, ProposalHoldReason, DefaultCollectiveDeposit, u32>;
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 pub struct ExtBuilder {
diff --git a/substrate/frame/identity/src/lib.rs b/substrate/frame/identity/src/lib.rs
index 11b43f958c4e..80bed3bb0e8f 100644
--- a/substrate/frame/identity/src/lib.rs
+++ b/substrate/frame/identity/src/lib.rs
@@ -130,7 +130,8 @@ use frame_support::{
 use frame_system::pallet_prelude::*;
 pub use pallet::*;
 use sp_runtime::traits::{
-	AppendZerosInput, Hash, IdentifyAccount, Saturating, StaticLookup, Verify, Zero,
+	AppendZerosInput, BlockNumberProvider, Hash, IdentifyAccount, Saturating, StaticLookup, Verify,
+	Zero,
 };
 pub use types::{
 	Data, IdentityInformationProvider, Judgement, RegistrarIndex, RegistrarInfo, Registration,
@@ -228,6 +229,9 @@ pub mod pallet {
 
 		/// Weight information for extrinsics in this pallet.
 		type WeightInfo: WeightInfo;
+
+		/// Provider for the block number. Normally this is the `frame_system` pallet.
+		type BlockNumberProvider: BlockNumberProvider<BlockNumber = BlockNumberFor<Self>>;
 	}
 
 	const STORAGE_VERSION: StorageVersion = StorageVersion::new(2);
@@ -1198,7 +1202,7 @@ pub mod pallet {
 		) -> DispatchResultWithPostInfo {
 			let _ = ensure_signed(origin)?;
 			if let Some((who, expiration, provider)) = PendingUsernames::<T>::take(&username) {
-				let now = frame_system::Pallet::<T>::block_number();
+				let now = T::BlockNumberProvider::current_block_number();
 				ensure!(now > expiration, Error::<T>::NotExpired);
 				let actual_weight = match provider {
 					Provider::AuthorityDeposit(deposit) => {
@@ -1517,7 +1521,7 @@ impl<T: Config> Pallet<T> {
 	/// A username was granted by an authority, but must be accepted by `who`. Put the username
 	/// into a queue for acceptance.
 	pub fn queue_acceptance(who: &T::AccountId, username: Username<T>, provider: ProviderOf<T>) {
-		let now = frame_system::Pallet::<T>::block_number();
+		let now = T::BlockNumberProvider::current_block_number();
 		let expiration = now.saturating_add(T::PendingUsernameExpiration::get());
 		PendingUsernames::<T>::insert(&username, (who.clone(), expiration, provider));
 		Self::deposit_event(Event::UsernameQueued { who: who.clone(), username, expiration });
diff --git a/substrate/frame/identity/src/tests.rs b/substrate/frame/identity/src/tests.rs
index a095085a8188..d4041d1b5ab1 100644
--- a/substrate/frame/identity/src/tests.rs
+++ b/substrate/frame/identity/src/tests.rs
@@ -92,6 +92,7 @@ impl pallet_identity::Config for Test {
 	type MaxSuffixLength = ConstU32<7>;
 	type MaxUsernameLength = ConstU32<32>;
 	type WeightInfo = ();
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 pub fn new_test_ext() -> sp_io::TestExternalities {
diff --git a/substrate/frame/utility/src/tests.rs b/substrate/frame/utility/src/tests.rs
index 274a90d77cf0..9feda8168172 100644
--- a/substrate/frame/utility/src/tests.rs
+++ b/substrate/frame/utility/src/tests.rs
@@ -193,6 +193,7 @@ impl pallet_collective::Config<CouncilCollective> for Test {
 	type DisapproveOrigin = EnsureRoot<Self::AccountId>;
 	type KillOrigin = EnsureRoot<Self::AccountId>;
 	type Consideration = ();
+	type BlockNumberProvider = frame_system::Pallet<Test>;
 }
 
 impl example::Config for Test {}