The Indian Union Muslim League has earlier filed a plea in the apex court against the CAA calling it 'unconstitutional'.
The petitioners state that while they do not oppose the grant of citizenship to migrants, they are aggrieved by the discrimination and illegal classification based on religion.
The Indian Union Muslim League (IUML) leadership on Wednesday said they would challenge the Citizenship (Amendment) Bill, 2019, in the Supreme Court.
Shah had blamed the Congress for partition on religious lines while introducing the Citizenship (Amendment) Bill in Lok Sabha.
Sharif, 69, left for London on November 19 in an air ambulance for medical treatment after the Lahore High Court allowed him to travel abroad for four weeks.
Pakistan court reserves judgement in Pervez Musharraf treason case, to announce verdict on November 28
Musharraf became Pakistan's first army chief to be charged with treason when he was indicted on March 31, 2014.
The 69-year-old Pakistan Muslim League-Nawaz (PML-N) supremo agreed on Friday to go to the UK for treatment, heeding doctors' advice and accepting his family's request.
IUML supremo Hyderali Shihab Thangal said they will accept the verdict and there should be no disturbance based on the verdict.
The 69-year-old former Pakistani Prime Minister, Nawaz Sharif, is serving his term at the Kot Lakhpat Jail in Lahore.
Nawaz and Maryam are expected to land at Lahore's Allama Iqbal International Airport at 6.15 p.m. (local time) from Abu Dhabi.
He was ousted from his third term as prime minister by the Supreme Court last year following a corruption investigation and banned from politics for life.
The order came days after a Pakistani court extended a stay against the "possible arrest" of the JuD chief till April 4.
Indian Union Muslim League (IUML) leader in the Lok Sabha PK Kunjalikutty alleged there were many "lacunae" and "contradictions" in the bill passed by the Lower House last week.
Saeed has confirmed that his organisation Jammat-.ud-Dawah (JuD) would contest the 2018 general elections under the banner of the MML
Pervez Musharraf has now said that he would welcome an alliance with global terrorist and 26/11 Mumbai attack mastermind Hafiz Saeed for the general election in 2018.