Chapter 2: Proposal Submission Policies 2.1 The Proposal Process: Phase I and Phase II 2.2 Deadlines 2.3 Who May Submit 2.3.1 Principal Investigator and Co-Investigators 2.3.2 ESA Scientists 2.3.3 Student PIs 2.4 Institutional Endorsement 2.5 Funding 2.6 Proposal Confidentiality