# Article 1 — Definitions **Commission Delegated Regulation (EU) 2025/299 · binding · OJ L, 2025/299, 13.2.2025 · dated 31 Oct 2024 [in force]** *In force · Commission Delegated Regulation (EU) 2025/299, OJ L, 2025/299, 13.2.2025 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/eli/reg_del/2025/299/oj/eng)* For the purposes of this Regulation, the following definitions shall apply:\ a) ‘[critical or important function](https://www.headlesslaw.com/definitions/dora/critical-or-important-function)’ means a critical or important function as defined in [Article 3](https://www.headlesslaw.com/dora/articles/3), point (22), of Regulation (EU) 2022/2554;\ b) ‘permissionless [distributed ledger](https://www.headlesslaw.com/definitions/mica/distributed-ledger)’ means a specific type of distributed ledger in which no entity controls the distributed ledger and DLT network nodes can be set up by any person complying with the technical requirements and the protocols of that distributed ledger.