Iowa Code § 622B.3: Notice of need.

When a deaf or hard-of-hearing person is entitled to a sign language interpreter, the deaf or hard-of-hearing person shall notify the presiding official within three days after receiving notice of the proceeding, stating the disability and requesting the services of a sign language interpreter. If the deaf or hard-of-hearing person receives notification of an appearance less than five days prior to the proceeding, that person shall notify the presiding official requesting a sign language interpreter as soon as practicable or may apply for a continuance until a sign language interpreter is appointed.