Haw. Rev. Stat. § 465-9: Temporary permit.

A person not licensed in the State who wishes to engage in the practice of psychology for a period not to exceed ninety days within a calendar year shall petition the board for a temporary permit. If the person is licensed or certified in another state deemed by the board to have standards equivalent to this chapter, the person shall be entitled to a temporary permit in the same manner and subject to the same conditions specified in section 465-8 applicable to the issuance of licenses. The period of ninety days may be extended at the discretion of the board but not to exceed ninety days.