Iowa Code § 622B.4: List.

The department of health and human services shall prepare and continually update a listing of qualified and available sign language interpreters. The courts and administrative agencies shall maintain a directory of qualified interpreters for deaf and hard-of-hearing persons as furnished by the department of health and human services. The department of health and human services shall maintain a list of sign language interpreters which shall be made available to a court, administrative agency, or interested parties to an action using the services of a sign language interpreter.