All petitions have taken the common ground that the 20A if enacted would impinge on the fundamental rights of the citizens.
The government on September 2 gazetted 20A, the new proposed legislation that would replace the 19th Amendment that strengthened the role of Parliament.
India has termed as untenable the 'artificial enlargement' of territorial claims by Nepal after its lower house of parliament on Saturday unanimously approved the new political map.
Nepal last month released the revised political and administrative map of the country laying claim over the strategically key areas of Lipulekh, Kalapani and Limpiyadhura.
Diplomatic ties between the two nations frayed further after the issuance of a new updated map by Nepal on May 20.