The United Nations' highest court will hold the first round of hearing on Monday before a formal stay order is expected to be passed by the 15-judge bench to let the court hold detailed hearings that could take months to conclude.
In all of four hearings between September 2016 and February 2017, a Pakistan military court had completed the trial against the 46-year-old Mr Jadhav, convicting him on multiple counts of terrorism that led to loss of "many lives and damage of property". India insists the former naval officer was on business to Iran from where he was abducted. Pakistan claimed he was caught from Baluchistan.
In making its case that Pakistan had violated the Vienna convention that mandated India should have been informed about his arrest and given access to him. New Delhi has produced all the letters exchanged with Islamabad to demonstrate that the only offer, even if conditional, to give consular access came after the trial had concluded. But it wasn't only the appeals process that was vitiated.
The application went on to argue that the remedy against the conviction cited by Mr Aziz was "worthless" since Pakistan army chief General Qamar Javed Bajwa had already confirmed the verdict.
Pakistan Prime Minister's Adviser on Foreign Affairs Sartaj Aziz had last month claimed Kulbhushan Jadhav's trial was conducted in a "fully transparent manner" and based on credible, specific evidence.
He had gone on to declare that he could appeal against the 10 April sentence within 40 days to the appellate military court, and file a mercy petition first to Chief of Army Staff, and then, to Pakistan President.
India has cited a news report in Pakistani newspaper Dawn that made it clear the appellate tribunal would be headed by a two-star general. "The spokesperson is quoted as having said that he did not see any chance of the verdict being overturned," the application by the foreign ministry's joint secretary Deepak Mittal said.