| Clue | Source | Date |
|---|---|---|
| Draw the line somewhere, say | New York Times | 11 Jun 2023 |
| Allow it to go no further | LA Times Daily | 24 Sep 2016 |
| Specify the maximum or minimum allowed | The Washington Post | 03 Apr 2016 |
| Allow it to go no further | ||
| Fix the ceiling? | ||
| Fix the ceiling? | ||
| Specify the maximum |