Haw. Rev. Stat. § 393-16

An employer who has been notified by an employee, in the form prescribed by the director, that the employer is not the principal employer as defined in section 393-6 shall be relieved of the duty of providing the coverage required by this chapter until the employer is notified by the employee pursuant to section 393-18 that the employer has become the principal employer. The employer shall notify the director, in the form prescribed by the director, that the employer is relieved from the duty of providing coverage or of any change in that status.