diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
new file mode 100644
index 000000000000..236e0d29b9ae
--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,95 @@
+# Lists some code owners.
+#
+# A codeowner just oversees some part of the codebase. If an owned file is changed then the
+# corresponding codeowner receives a review request. An approval of the codeowner might be
+# required for merging a PR (depends on repository settings).
+#
+# For details about syntax, see:
+# https://help.github.com/en/articles/about-code-owners
+# But here are some important notes:
+#
+# - Glob syntax is git-like, e.g. `/core` means the core directory in the root, unlike `core`
+#   which can be everywhere.
+# - Multiple owners are supported.
+# - Either handle (e.g, @github_user or @github/team) or email can be used. Keep in mind,
+#   that handles might work better because they are more recognizable on GitHub
+#   and you can use them for mentioning unlike an email.
+# - The latest matching rule, if multiple, takes precedence.
+
+# Top levels
+/.cargo @paritytech/ci
+/.config @paritytech/ci
+/.github @paritytech/ci @paritytech/release-engineering
+/.gitlab @paritytech/ci
+/bridges @paritytech/bridges-core
+/cumulus @paritytech/cumulus-locks-review @paritytech/core-devs
+/docker @paritytech/ci @paritytech/release-engineering
+/docs @paritytech/docs-audit
+/polkadot @paritytech/polkadot-review
+/polkadot/xcm @paritytech/xcm
+/scripts/ci @paritytech/ci @paritytech/release-engineering
+/substrate @paritytech/SubstrateTeamLeads
+/prdoc @paritytech/release-engineering
+
+.gitlab-ci.yml @paritytech/ci
+.rustfmt.toml @paritytech/core-devs
+Cargo.toml @paritytech/core-devs
+*.md @paritytech/docs-audit
+
+# WASM executor, low-level client <-> WASM interface and other WASM-related code
+/substrate/client/allocator/ @koute
+/substrate/client/executor/ @koute
+/substrate/primitives/panic-handler/ @koute
+/substrate/primitives/runtime-interface/ @koute
+/substrate/primitives/wasm-interface/ @koute
+/substrate/utils/wasm-builder/ @koute
+
+# Systems-related bits and bobs on the client side
+/substrate/client/sysinfo/ @koute
+/substrate/client/tracing/ @koute
+
+# Documentation audit
+/substrate/primitives/runtime @paritytech/docs-audit
+/substrate/primitives/arithmetic @paritytech/docs-audit
+# /primitives/core (to be added later)
+# /primitives/io (to be added later)
+
+# Networking-related code
+/substrate/client/network @paritytech/networking 
+
+# FRAME
+/substrate/frame/ @paritytech/frame-coders @paritytech/docs-audit
+/substrate/frame/nfts/ @jsidorenko @paritytech/docs-audit
+/substrate/frame/state-trie-migration/ @paritytech/frame-coders @cheme
+/substrate/frame/uniques/ @jsidorenko @paritytech/docs-audit
+
+# GRANDPA, BABE, consensus stuff
+/substrate/client/consensus/babe/ @andresilva
+/substrate/client/consensus/beefy/ @acatangiu
+/substrate/client/consensus/grandpa/ @andresilva
+/substrate/client/consensus/pow/ @sorpaas
+/substrate/client/consensus/slots/ @andresilva
+/substrate/frame/babe/ @andresilva
+/substrate/frame/grandpa/ @andresilva
+/substrate/primitives/consensus/pow/ @sorpaas
+
+# BEEFY, MMR
+/substrate/frame/beefy/ @acatangiu
+/substrate/frame/beefy-mmr/ @acatangiu
+/substrate/frame/merkle-mountain-range/ @acatangiu
+/substrate/primitives/merkle-mountain-range/ @acatangiu
+
+# Contracts
+/substrate/frame/contracts/ @athei @paritytech/docs-audit
+
+# NPoS and election
+/substrate/frame/election-provider-multi-phase/ @paritytech/staking-core @paritytech/docs-audit
+/substrate/frame/election-provider-support/ @paritytech/staking-core @paritytech/docs-audit
+/substrate/frame/elections-phragmen/ @paritytech/staking-core @paritytech/docs-audit
+/substrate/frame/nomination-pools/ @paritytech/staking-core @paritytech/docs-audit
+/substrate/frame/staking/ @paritytech/staking-core @paritytech/docs-audit
+/substrate/primitives/npos-elections/ @paritytech/staking-core @paritytech/docs-audit
+
+# Cumulus
+/cumulus/xcm/xcm-emulator @nachopal
+/cumulus/parachains/integration-tests @nachopal
diff --git a/cumulus/CODEOWNERS b/cumulus/CODEOWNERS
deleted file mode 100644
index 3e5e8bd062dd..000000000000
--- a/cumulus/CODEOWNERS
+++ /dev/null
@@ -1,23 +0,0 @@
-# Lists some code owners.
-#
-# A codeowner just oversees some part of the codebase. If an owned file is changed then the
-# corresponding codeowner receives a review request. An approval of the codeowner might be
-# required for merging a PR (depends on repository settings).
-#
-# For details about syntax, see:
-# https://help.github.com/en/articles/about-code-owners
-# But here are some important notes:
-#
-# - Glob syntax is git-like, e.g. `/core` means the core directory in the root, unlike `core`
-#   which can be everywhere.
-# - Multiple owners are supported.
-# - Either handle (e.g, @github_user or @github/team) or email can be used. Keep in mind,
-#   that handles might work better because they are more recognizable on GitHub,
-#   eyou can use them for mentioning unlike an email.
-# - The latest matching rule, if multiple, takes precedence.
-
-# CI
-/.github/ @paritytech/ci @paritytech/release-engineering
-/.gitlab-ci.yml @paritytech/ci
-/scripts/ci/ @paritytech/ci @paritytech/release-engineering
-
diff --git a/polkadot/.github/CODEOWNERS b/polkadot/.github/CODEOWNERS
deleted file mode 100644
index a92dc0bb006c..000000000000
--- a/polkadot/.github/CODEOWNERS
+++ /dev/null
@@ -1,6 +0,0 @@
-# CI
-/.github/ @paritytech/ci @chevdor
-/scripts/ci/ @paritytech/ci @chevdor
-/.gitlab-ci.yml @paritytech/ci
-# lingua.dic is not managed by CI team
-/scripts/ci/gitlab/lingua.dic
diff --git a/substrate/docs/CODEOWNERS b/substrate/docs/CODEOWNERS
deleted file mode 100644
index 63294d90e9d0..000000000000
--- a/substrate/docs/CODEOWNERS
+++ /dev/null
@@ -1,74 +0,0 @@
-# Lists some code owners.
-#
-# A codeowner just oversees some part of the codebase. If an owned file is changed then the
-# corresponding codeowner receives a review request. An approval of the codeowner is
-# not required for merging a PR though.
-#
-# **This is pretty much an experiment at the moment**. Feel free to remove yourself at any time if
-# you do not want to receive review requests any longer.
-#
-# For details about syntax, see:
-# https://help.github.com/en/articles/about-code-owners
-# But here are some important notes:
-#
-# - Glob syntax is git-like, e.g. `/core` means the core directory in the root, unlike `core` which
-#   can be everywhere.
-# - Multiple owners are supported.
-# - Either handle (e.g, @pepyakin) or email can be used. Keep in mind, that handles might work better because they
-#   are more recognizable on GitHub, you can use them for mentioning unlike an email.
-# - The latest matching rule, if multiple, takes precedence.
-
-# CI
-/.github/ @paritytech/ci
-/.gitlab-ci.yml @paritytech/ci
-/scripts/ci/ @paritytech/ci
-
-# WASM executor, low-level client <-> WASM interface and other WASM-related code
-/client/allocator/ @koute
-/client/executor/ @koute
-/primitives/panic-handler/ @koute
-/primitives/runtime-interface/ @koute
-/primitives/wasm-interface/ @koute
-/utils/wasm-builder/ @koute
-
-# Systems-related bits and bobs on the client side
-/client/sysinfo/ @koute
-/client/tracing/ @koute
-
-# Documentation audit
-/primitives/runtime @paritytech/docs-audit
-/primitives/arithmetic @paritytech/docs-audit
-# /primitives/core (to be added later)
-# /primitives/io (to be added later)
-
-# FRAME
-/frame/ @paritytech/frame-coders @paritytech/docs-audit
-/frame/nfts/ @jsidorenko @paritytech/docs-audit
-/frame/state-trie-migration/ @paritytech/frame-coders @cheme
-/frame/uniques/ @jsidorenko @paritytech/docs-audit
-
-# GRANDPA, BABE, consensus stuff
-/client/consensus/babe/ @andresilva
-/client/consensus/grandpa/ @andresilva
-/client/consensus/pow/ @sorpaas
-/client/consensus/slots/ @andresilva
-/frame/babe/ @andresilva
-/frame/grandpa/ @andresilva
-/primitives/consensus/pow/ @sorpaas
-
-# BEEFY, MMR
-/frame/beefy/ @acatangiu
-/frame/beefy-mmr/ @acatangiu
-/frame/merkle-mountain-range/ @acatangiu
-/primitives/merkle-mountain-range/ @acatangiu
-
-# Contracts
-/frame/contracts/ @athei @paritytech/docs-audit
-
-# NPoS and election
-/frame/election-provider-multi-phase/ @paritytech/staking-core @paritytech/docs-audit
-/frame/election-provider-support/ @paritytech/staking-core @paritytech/docs-audit
-/frame/elections-phragmen/ @paritytech/staking-core @paritytech/docs-audit
-/frame/nomination-pools/ @paritytech/staking-core @paritytech/docs-audit
-/frame/staking/ @paritytech/staking-core @paritytech/docs-audit
-/primitives/npos-elections/ @paritytech/staking-core @paritytech/docs-audit