Analysis of information sources in references of the Wikipedia article "Triều đại Pahlavi" in Vietnamese language version.
(..) His mother, who was of Georgian origin, died not long after, leaving Reza in her brother's care in Tehran. (...).
His Imperial Highness Reza Pahlavi, Crown Prince of Iran, will reach his constitutional majority on the 9th of Aban, 1359 (October 31, 1980). On this date, and in conformity with the Iranian Constitution, the regency of Her Imperial Majesty Farah Pahlavi, Shahbanou of Iran, will come to an end and His Imperial Highness, who on this occasion will send a message to the people of Iran, will succeed his father, His Imperial Majesty Mohammed Reza Shah Pahlavi, deceased in Cairo on Mordad 5, 1359 (July 27, 1980).
His Imperial Highness Reza Pahlavi, Crown Prince of Iran, will reach his constitutional majority on the 9th of Aban, 1359 (October 31, 1980). On this date, and in conformity with the Iranian Constitution, the regency of Her Imperial Majesty Farah Pahlavi, Shahbanou of Iran, will come to an end and His Imperial Highness, who on this occasion will send a message to the people of Iran, will succeed his father, His Imperial Majesty Mohammed Reza Shah Pahlavi, deceased in Cairo on Mordad 5, 1359 (July 27, 1980).