Final answer:
Drivers may not break into the line of a funeral procession unless authorized to do so.
Step-by-step explanation:
The subject of this question is Law and it is of High School level.
Unless authorized to do so, drivers may not break into the line of a funeral procession.
This means that it is true that drivers are not allowed to break into the line of a funeral procession unless they have been given permission to do so.