| Date | Change Type | Time Delta (hours) | Reason |
| Jul 27, 2017 | OBSERVER_REQUESTED | +9.0 | Observer requested change to default allocation. |
| Mar 17, 2020 | OBSERVER_REQUESTED | -1.2 | This was originally adjusted to avoid issues with the intervening APT versions, but now the final version is available, PI would like this adjusted back to 19.0 hrs from 20.2 hrs |
| Dec 19, 2020 | OVERHEAD_CHANGE | -0.2 | APT 2020.5 |
| Jul 01, 2021 | OVERHEAD_CHANGE | +0.1 | APT 2021.2 |
| Sep 25, 2021 | OVERHEAD_CHANGE | +0.1 | PRDOPSSOC-040 |
| Feb 12, 2022 | OVERHEAD_CHANGE | +0.3 | APT 2022.1 |
| May 17, 2022 | OVERHEAD_CHANGE | -0.2 | APT 2022.3 |
| Jun 07, 2022 | OVERHEAD_CHANGE | +0.3 | APT 2022.3.1 |
| Jul 06, 2022 | OVERHEAD_CHANGE | +0.3 | PRDOPSSOC-055 |
| Aug 04, 2022 | OVERHEAD_CHANGE | -0.2 | APT 2022.3.3 |
| Sep 08, 2022 | OVERHEAD_CHANGE | +0.3 | OSS 8.4.13 |
| Sep 15, 2022 | OVERHEAD_CHANGE | -0.2 | APT 2022.5.3 |
| Nov 18, 2022 | OVERHEAD_CHANGE | +1.4 | APT 2022.7.1 |
| Feb 21, 2023 | STSCI_RECOMMENDATION | +15.7 | TTRB has approved change request 88687 to add 15.7 hours for added background observations to JWST Program 1241, to remove the anomalous “glow stick” emission, following a recommendation from the MIRI coronagraph team. |
