Large Programs may designate any number of co-PIs, who share the overall responsibility with the PI in conducting the proposed science, however only the PI has the responsibility for SBs preparation and approval, and the delivery of the data products in accordance with the ALMA Users’ Policies. The requested observing time will be split among the regions (North America, Europe, East Asia, and Chile) based on the proportionality of the Executive affiliation of the PI and co-PIs.