Final answer:
Usually, individuals aged 12 to 15 are not permitted to carry passengers of their age or younger, although specific regulations may vary.
Step-by-step explanation:
The question pertains to the legal operation of a Personal Watercraft (PWC), such as a jet ski. Legislation varies by location, but generally anyone aged 12 through 15 is restricted in how they can operate a PWC.
These age groups are typically not allowed to have passengers on board, particularly those of their age or younger.
The precise age of passengers that would be prohibited could depend on specific state or local regulations. It's crucial for anyone operating a PWC to be aware of and comply with all local boating and safety laws to ensure the safety of themselves and others.
Hence, it is illegal for anyone 12 through 15 years of age to operate a PWC with any passengers what age or younger.