Haw. Rev. Stat. § 431:6-305: Equipment trust obligations.

An insurer may invest any of its funds, in an aggregate amount not exceeding ten per cent of its assets, in equipment trust obligations or certificates which are adequately secured, or in other adequately secured instruments evidencing an interest in transportation equipment wholly or in part within the United States and the right to receive determined portions of rental, purchase, or other fixed obligatory payments for the use or purchase of such transportation equipment.