[ShadowAce]

1 is supposed to parallel the phrase “at least” to BOTH of the descriptions. It’s parallelism.

Exactly. Once the child is 8 years old, the "or" means the conditions have been met. A 4'1" 9-year-old would not have to sit in a booster seat.

[null and void]

Maybe it’s in the same sense that google uses “AND”. They say and think that the search terms are ANDed together.

If that were so, adding more search terms world narrow the search and give fewer, better targeted answers.

In practice, you get more, less on point, answers.