Final answer:
Children under the age of 13 are required by federal law to wear a lifejacket on a moving boat. The exceptions to this rule are: children who can swim, children who are accompanied by their parents, and children on boats smaller than 20 feet.
Step-by-step explanation:
The only exceptions to the federal law requiring children under the age of 13 to wear a lifejacket on a moving boat are:
- Children who can swim.
- Children who are accompanied by their parents.
- Children on boats smaller than 20 feet.
In all other cases, regardless of the size of the boat, children under 13 must wear a lifejacket.