Bracco Industria Chimica Spa, Milan, poi Bracco Spa: application for a change of composition limited to the excipient of the medicinal speciality "Diazil" compr. 500 mg. and documentation relating to the request for waiver of registration of the various preparations, sent to the Ministry of Health, General Directorate of the Pharmaceutical Service, communications in particular with Bracco General Affairs Office in Rome, poi Delegation of Rome.