2.5 Funding Subject to availability of funds from NASA, STScI will provide financial support for U.S. PIs and CoIs of approved Cycle 21 programs. Budgets are not due in Phase I, but are required in Phase II from successful proposers. Details of the STScI Funding Policies are outlined in Chapter 12. ESA does not fund HST research programs. Therefore, successful ESA member-state proposers should seek any necessary resources from their respective home institutions or national funding agencies.