The bill had already been passed by the lower house a day earlier after receiving support from both the treasury and opposition benches. Pakistan Tehreek-i-Insaf (PTI) Chairman Imran Khan, who rarely attends NA sessions, also participated in the historic vote which was opposed by government allies Jamiat Ulema-i-Islam-Fazl (JUI-F) and Pakhtunkhwa Milli Awami Party (PkMAP) who chose to walk out.