Indefeasible Right of Use meaning

An indefeasible right of use (IRU) is a long‑term, non‑revocable contractual right to use identified telecommunications capacity—such as a wavelength, fibre pair or dark fibre—on a submarine or terrestrial network, usually for the economic life of that asset. It does not transfer ownership of the cable or infrastructure; instead it grants the holder exclusive use of the specified capacity, often with restoration, maintenance and service obligations on the owner/operator. IRU is an industry term rather than a concept defined in UK or Irish legislation or case law; its legal effect depends on the contract. Typical features include a term of 15–25 years or life‑of‑system; an upfront, capital‑style fee plus periodic operation and maintenance charges; rights that are “indefeasible” except for defined breaches; and limited assignment/transfer rights. IRUs are commonly used in subsea (including international) cable consortia and sold to third parties, allowing carriers and content providers to secure guaranteed capacity without joining the consortium. Across England & Wales, Scotland, Northern Ireland and Ireland, an IRU is generally treated as a personal contractual right, not a property interest in land or a spectrum licence; local rules on assignment, taking security and insolvency may affect its enforceability.