وَجَهْرُ الْإِمَامِ بِقِرَاءَةِ الْفَجْرِ وَأُولَيَيِ الْعِشَاءَيْنِ وَلَوْ قَضَاءً، وَالْجُمُعَةِ وَالْعِيدَيْنِ وَالتَّرَاوِيحِ وَالْوِتْرِ فِي رَمَضَانَ
The Imam's aloud recitation is Wajib in:
• both rak'ahs of Fajr;
• the first two rak'ahs of Maghrib and Isha, including their Qada;
• Jumu'ah and the two Eid prayers;
• Tarawih;
• Witr in Ramadan when led in congregation.