Haw. Code R. § 17-676-96
The earned income of any household member who is under age eighteen, who is an elementary or secondary school student, and who lives with a natural, adoptive, or stepparent or under the parental control of a household member other than a parent. For purposes of this provision, an elementary or secondary school student is someone who attends elementary or secondary school, or who attends classes to obtain a General Equivalency Diploma that are recognized, operated, or supervised by the student's state or local school district, or who attends elementary or secondary classes through a home-school program recognized or supervised by the student's state or local school district. The exclusion shall continue to apply during temporary interruptions in school attendance due to semester or vacation breaks, provided the child's enrollment will resume following the break. If the child's earnings or amount of work performed cannot be differentiated from that of other household members, the total earnings shall be prorated equally among the working members and the child's prorata share excluded.
Haw. Code R. § 17-676-96