Whenever any assessment, deficit, or reassessment for any local improvement which has been made by the city is set aside, annulled, declared or rendered void, or its enforcement is restrained by any court of competent jurisdiction, or when the council doubts the validity of the assessment or reassessment or any part thereof, the council may reassess in the manner provided by state law provided, however, that the council or its designee may conduct any hearings as provided in sections 7.166 and 7.187.