HRS §321-212
No tobacco for people under 21 in public
This law says that anyone under 21 cannot have or use tobacco products in a public place. It is a simple rule with no exceptions or extra details.
everyone
The statute, as written — Tobacco products; possession or consumption prohibited
Possession or consumption of a tobacco product by a person under twenty-one years of age in a public place shall be prohibited.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.