The Princeton Plasma Physics Laboratory is issuing draft procurement documents for the manufacture of the main Upper Wide Angle Viewing diagnostic subsystems for ITER. This is an advance notice to allow potential suppliers to review information and prepare for three upcoming Requests for Proposals, which are expected to be issued by May 2026. The notice invites voluntary comments or questions, especially suggestions to improve the clarity of the requirements, but no response is required to remain eligible for the future RFPs. All comments and questions should be directed electronically to a specified contact.