diff --git a/src/99-appendices/04-entity-table.md b/src/99-appendices/04-entity-table.md
index 36fd41cc4c..78229d63ee 100644
--- a/src/99-appendices/04-entity-table.md
+++ b/src/99-appendices/04-entity-table.md
@@ -12,7 +12,7 @@ file type are denoted. Entity formats indicate whether the value is alphanumeric
 | Subject                  | `sub-<label>`       | REQUIRED                                                                                       | REQUIRED             | REQUIRED                    | REQUIRED              | REQUIRED               | REQUIRED                                                                   | REQUIRED      | REQUIRED                    | REQUIRED | REQUIRED | REQUIRED | REQUIRED                   | REQUIRED            | REQUIRED                | REQUIRED                 | REQUIRED                 |
 | Session                  | `ses-<label>`       | OPTIONAL                                                                                       | OPTIONAL             | OPTIONAL                    | OPTIONAL              | OPTIONAL               | OPTIONAL                                                                   | OPTIONAL      | OPTIONAL                    | OPTIONAL | OPTIONAL | OPTIONAL | OPTIONAL                   | OPTIONAL            | OPTIONAL                | OPTIONAL                 | OPTIONAL                 |
 | Task                     | `task-<label>`      |                                                                                                |                      | REQUIRED                    | REQUIRED              |                        |                                                                            |               | REQUIRED                    | REQUIRED | REQUIRED | REQUIRED | REQUIRED                   |                     |                         |                          | REQUIRED                 |
-| Acquisition              | `acq-<label>`       | OPTIONAL                                                                                       | OPTIONAL             | OPTIONAL                    | OPTIONAL              | OPTIONAL               | OPTIONAL                                                                   | OPTIONAL      |                             | OPTIONAL | OPTIONAL | OPTIONAL |                            | OPTIONAL            | OPTIONAL                | OPTIONAL                 | OPTIONAL                 |
+| Acquisition              | `acq-<label>`       | OPTIONAL                                                                                       | OPTIONAL             | OPTIONAL                    | OPTIONAL              | OPTIONAL               | OPTIONAL                                                                   | OPTIONAL      |                             | OPTIONAL | OPTIONAL | OPTIONAL |                            | OPTIONAL            | OPTIONAL                | OPTIONAL                 |                          |
 | Contrast Enhancing Agent | `ce-<label>`        | OPTIONAL                                                                                       | OPTIONAL             | OPTIONAL                    |                       |                        |                                                                            | OPTIONAL      |                             |          |          |          |                            |                     |                         |                          |                          |
 | Reconstruction           | `rec-<label>`       | OPTIONAL                                                                                       | OPTIONAL             | OPTIONAL                    | OPTIONAL              |                        |                                                                            |               |                             |          |          |          |                            |                     |                         |                          |                          |
 | Phase-Encoding Direction | `dir-<label>`       |                                                                                                |                      | OPTIONAL                    |                       | OPTIONAL               |                                                                            | REQUIRED      |                             |          |          |          |                            |                     |                         |                          |                          |