(1) A person commits the offense of assault against an emergency worker if the person, during an emergency period proclaimed by the governor or mayor pursuant to chapter 127A, within the area covered by the emergency or disaster:
(a) Intentionally, knowingly, or recklessly causes serious or substantial bodily injury to an emergency worker; or
(b) Intentionally, knowingly, or recklessly causes bodily injury to an emergency worker with a dangerous instrument.
(2) Assault against an emergency worker is a class B felony.