The plenary chamber has seating for 400 people, ostensibly in preparation for new lawmakers in case Korean reunification occurs. The National Assembly Proceeding Hall has been used for the inaugurations for several presidents Roh Tae-woo in 1988, Kim Young-sam in 1993, Kim Dae-jung in 1998, Roh Moo-hyun in 2003, Lee Myung-bak in 2008, Park Geun-hye in 2013, Moon Jae-in in 2017, and Yoon Suk-yeol in 2022.
The main chamber has seating capacity of 400 individuals, supposedly in anticipation of new legislators in the event of Korean reunification. The National Assembly Meeting Hall has been utilized for inauguration ceremonies for several presidents Roh Tae-woo in 1988, Kim Young-sam in 1993, Kim Dae-jung in 1998, Roh Moo-hyun in 2003, Lee Myung-bak in 2008, Park Geun-hye in 2013, Moon Jae-in in 2017, and Yoon Suk-yeol in 2022.