مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٢٠٧ - AZAN AND IQAMAH

congregational prayers is offered within the masjid and that person wishes to offer prayers on theroof of the masjid it is recommended that he should pronounce Azan and Iqamah.
(v) When the prayers of the man and the congregational prayers both are offered in prescribedtime (Ada) (not the lapsed ones).
(vi) When the time for both the persons prayers and the congregational prayers is common. For example, both of them are offer midday prayers or afternoon prayers, or theprayers being offered by the congregation are midday prayers and the prayers being offered by the man are the afternoon prayers, or he may he offerg midday prayers and the congregational prayers are the afternoon prayers.
٩٣٥. If the person concerned entertain doubt about the third condition out of the conditions narrated in the foregoing article i.e. if he doubts whether or not the congregational prayers is in order he is excused from pronouncing Azan and Iqamah However, if he entertains doubt in his mind about any one of the other five conditions it is recommended that he should pronounce Azan and Iqamah.
٩٣٦. It is recommended that if a person hears Azan or Iqamah he should also utter in a low voice the part which he happens to hear.
٩٣٧. If a person hears another person pronouncing Azan and Iqamah, (whether he has repeated the same or not) and there is not much difference of time between thatAzan andlqamah and the prayers he is going to offer, it is permissible for him not to pronounce Azan and Iqamah for his prayers.
٩٣٨. If a man hears the Azan, pronounced by a woman, for the sake of enjoyment, he himself is not excused from pro- nouncing Azan. On the other hand even if hisobject in hearing her Azan is not enjoyment, he is not excused from pronouncing the Azan.