When doing a "change assignment", the team wants 2 fields to be only editable depending on the value

Summary:

When doing a "change assignment", the team wants 2 fields to be only editable depending on the value of another field, and this needs to be applicable for a certain role (Line Managers).
They want  Assignment Category and Regular or Temporary fields to be editable only when the Action Reasons of Job Change / Lateral Transfer or Promotion are selected.

Is this something that can be done?

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