Haw. Rev. Stat. § 398A-5: [ §398A-5] Employee rights.

[ §398A-5] Employee rights. (a) An employer shall not interfere with, restrain, or deny the exercise of, or an attempt to exercise, a right established by this chapter.

(b) An employer shall not discharge, fine, suspend, expel, discipline, or in any other manner discriminate against an employee who:

(1) Exercises a right provided under this chapter; or

(2) Opposes a practice made unlawful by this chapter.