Under what condition do you NOT need to issue Form D line 8 and 9?

The correct answer highlights scenarios where issuing Form D, specifically lines 8 and 9, is not required. Lines 8 and 9 of Form D relate to the movement of trains in the vicinity of the disabled train that affect the safety and clearance of the location.

If the disabled train is stopped within 1/4 mile of an interlocking or control point, it poses a potential risk for train movements in that area, necessitating clear communication and authority through Form D. However, when the disabled train is within this proximity, the expectation is to issue the proper line notifications to ensure safety.

Furthermore, when the assisting train is managed by the same crew as the disabled train, the need for line 8 and 9 is also mitigated. This is because the crew is already aware of the situation and can manage their movements accordingly without the need for extra formal notifications that Form D lines 8 and 9 would provide.

In essence, if either condition is met—being close enough to an interlocking or control point, or the assisting train being managed by the disabled train's crew—Form D lines 8 and 9 are not necessary, confirming the rationale behind the correct answer.