When do you add no-divide?

Example:

% Daily Value *

Total Fat 8g 10%

Saturated Fat 1g 5%

Trans Fat 0g

When exactly is “no-divide” used? It seems like “no-divide” here is added when there is an indent. When else is “no divide” used?

As I understand no-divide was used when you don’t need extra layer of border below.