The document summarizes the nationally significant infrastructure project (NSIP) process in the UK. It outlines the types of projects that are considered NSIPs and the application process overseen by the Infrastructure Planning Commission. The process involves pre-application consultation, acceptance of the application by the IPC, pre-examination by interested parties, examination including hearings, and a final decision. It also notes some of the political discussions around the future of the IPC and NSIP process.