What’s the requirements for booster seats?

Okay so I have a 5 year old and I have a almost 2 year old.

What I want to know is how big or/and old do they have to be before using the booster seat in cars?

I know the law now is something to the effect of until they are 8 years old or something like that.

My daughter is in a booster seat now and I think I put her in it at 3 years old but I can’t remember for sure, and anyways I want to put my son in a booster seat soon because I hate his car seat!

A child should be in a car seat with a five point harness until they reach 40 pounds. At 40 pounds they can be in a car seat without the 5 point harness (shoulder straps) or a booster seat.

They have to be in a booster seat until they are 8 or 80 pounds, which ever comes first.

“Click It or Ticket It” to boost safety belt use and save lives
Sugar Land police are joining state and local law enforcement agencies from May 24 to June 6 for an aggressive “Click It or Ticket” mobilization to crack down on safety belt violations and reduce highway fatalities.