This practical guidance relates to the Procurement Act 2023 regime As of 24 February 2025, the main provisions of the Procurement Act 2023 (PA 2023) are in force. Procurements begun on or after this date must be carried out under PA 2023 (where applicable), whereas those begun under the previous legislation (the Public Contracts Regulations 2015, SI 2015/102, the Utilities Contracts Regulations 2016, SI 2016/274, the Concession Contracts Regulations 2016, SI 2016/273, and the Defence and Security Public Contracts Regulations 2011, SI 2011/1848) must continue to be procured and managed under that legislation. This practical guidance focusses on public procurement under PA 2023. For background reading on the previous regime, see Practice Note: Introduction to public contracts procurement—pre PA 2023 [Archived]. For practical guidance on automatic suspension under the previous legislation, see Practice Note: Automatic suspension—pre-PA 2023. Automatic suspension PA 2023, which governs procurements of public contracts above applicable thresholds (see Practice Note: Introduction to the Procurement Act 2023—PA 2023 ), automatically imposes a requirement that prevents a contracting authority from entering into or modifying