When two organizations know exactly what data they want to share, for what purpose, and for how long they sign up for ISA Tier 2. Email: firstname.lastname@example.org If your organisation intends to share information with Avon and Somerset Police, make sure you are enrolled in our ISA Tier 1. IsA Tier 1 is implemented to ensure that the regular exchange of personal data is carried out in accordance with data protection laws. The latest version of the protocol is 3.1. If you have any questions about this agreement, please contact the Information Sharing Coordinator: If an organization wishes to be part of our sharing protocol, they sign an Information Sharing Agreement (ISA) called Level 1. It is signed by or on behalf of a chief executive officer or equivalent corporation for each organization. If your organization is not listed above, download our Level 1 Information Sharing Agreement Template (PDF). .