PIs or Data Delegees can request via this link that QA0-pass raw data should be staged for download as soon as they are available i.e. before the full QA2 products are ready. More information can be found here.
The proprietary period for the MOUS will start after the raw data from the first Execution Block (EB) in the MOUS have been made available to the PI. The release only consists of the raw data and does not include any scripts for the calibration and imaging of the data or image products.
The release of raw data to the PIs will have no implications on the QA2 process. QA2 data will continue to be delivered to all PIs, irrespective of whether they chose to download the raw data. The proprietary time on data that have been requested at QA0 will not be changed if the associated MOUS goes on to fail QA2 i.e. the proprietary time will still be 12 months from the time the QA0 data were made available. Note that the QA0-access policy supercedes the previous stale data and early release of ToO and time critical data policies.
More information on the early access and proprietary time of observational data can be found in the ALMA Users' Policies.