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Hubble Space Telescope Call for Proposals for Cycle 21 > Chapter 8: Filling Out the APT Proposal Form > 8.7 Proprietary Period

8.7 Proprietary Period
(This item appears in the APT form only for GO and SNAP proposals)
Enter the requested proprietary period, either 0, 3, 6 or 12 (months), that will apply to all observations in the program. The default proprietary period is 0 for Large, Treasury, and Calibration GO Programs, and 12 for Regular GO, Medium GO, and Snapshot Programs. See Section 5.1 on Data Rights for more information. The benefits of or need for a non-default proprietary period must be discussed in the ‘Special Requirements’ section of the proposal (see Section 9.3).

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