See the attachment or follow the link for the Amtrak Michigan Sub Timetable No. 6, effective June 17, 2024. Signals are on Section 10, pages 1-2. There are no changes from TT No. 5 except the aspect display format has changed with the aspect letter now visible in the timetable.
Amtrak Michigan Subdivision Timetable No. 6 Effective Monday, June 17, 2024.pdf
On the signal indications test, the timetable has omitted the word "speed" in the last couple of printings on the 9.1.13 Limited Clear indication, so the test could read "maximum authorized speed" or just "maximum authorized," which is how it should read because that's how the current timetable reads. Unless they issue an order amending it.
I made a note on the practice exam question which will display after you submit your answer.