Guidance

Guidance on how the single source regulatory framework applies to qualifying sub-contracts

The guidance identifies and summarises the provisions of the regulatory framework for single source defence contracts which relate to qualifying sub-contracts.

Documents

Notice of QSC assessment form

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email enquiries@ssro.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Notice of a positive QSC assessment form

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email enquiries@ssro.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

The regulatory framework for single source defence contracts applies to qualifying sub-contracts (QSCs) and to sub-contractors as it applies to qualifying defence contracts (QDCs) and to primary contractors subject to specified modifications. The regulatory framework defines when a contract is a QSC and confers a number of related obligations, rights, and powers, where specified, on the Ministry of Defence (MOD), the parties to qualifying contracts, and the SSRO. The SSRO’s guidance on qualifying sub-contracts identifies and summarises the relevant provisions of the regulatory framework and signposts readers to related SSRO guidance (for example, on contract pricing and on reporting) which should be considered alongside this document.

The guidance was prepared following a request from industry for an accessible summary of the complex regulatory provisions related to QSCs. The published guidance takes account of the feedback received from stakeholders on the draft guidance on which we consulted from April to May 2025.

Updates to this page

Published 30 June 2025

Sign up for emails or print this page