As a trade association, membership is voluntary but the companies who choose to become members agree to abide by the ISPA United Kingdom Code.
ISPA's main activity is in making representations on behalf of the industry to Government bodies, such as the Home Office, the Department for Business, Enterprise and Regulatory Reform (former DTI) and Ofcom.
ISPA represents members to Government and extra-parliamentary bodies in the UK, as well as dealing with media enquiries relating to ISPs' role online.
EuroISPA voices ISPs concerns to politicians and officials at European Union level and influences EU Internet policies.
[4][5][6] After receiving backlash,[7][8][9] the ISPA withdrew Mozilla's nomination as well as the category altogether, however still expressed concern over the DoH protocol.