A Parent of Past Student can view their Past Students Report Card, as long as the Task is enabled.

A platform manager can enable or disable past parent's ability to view report cards using the following steps:
  1. Navigate to Core > Security> Roles
  2. Click on Past Parent
  3. Click on Tasks
  4. Click Edit
  5. Un-mark the Desktop and App checkboxes for Report Cards if you want to remove the ability, or Mark the checkboxes for App and Desktop if you want them to have the ability
  6. Click Save & Exit