This content is no longer being updated. Up-to-date SPPNs can be found at: https://beta.gov.scot/publications/scottish-procurement-policy-notes-index/
Caution should be exercised when reading older SPPNs. This is because these were written at a given point in time and, while the majority of principles, guidance and individual references to legislation, web links etc. will still be relevant today some of these might also have been superseded.