Contemporary Primary Sources :: Fatwās - Contemporary :: 18 Ramaḍān 1403 / 27 June 1983
Indonesian Council of Ulama Fatwa on Praying in a Tiered Mosque
Dewan Pimpinan Majelis Ulama Indonesia, Posted by Daniel Peterson, 21 March 2016
This fatwa states that praying (shalat) in a tiered mosque with one imam is allowed and correct, provided there are stairs and the congregation can either see or hear the imam's movements.