Haw. Rev. Stat. § 457A-6: Certification required.

Except as otherwise provided in this chapter, no person shall:

(1) Represent one's self as a certified nurse aide;

(2) Imply, in any manner, that one's self is a certified nurse aide; or

(3) Use the abbreviation "C.N.A." or any other words, letters, signs, or devices to identify one's self as a certified nurse aide;

without having first obtained certification as provided in this chapter.