the Seventh Schedule makes it clear that if the arbitrator falls in any one of the categories specified in the Seventh Schedule, he becomes “ineligible” to act as arbitrator. Once he becomes ineligible, it is clear that, under Section 14(1)( a ), he then becomes de jure unable to perform his functions inasmuch as, in law, he is regarded as “ineligible”. In order to determine whether an arbitrator is de jure unable to perform his functions, it is not necessary to go to the Arbitral Tribunal under Section 13. Since such a person would lack inherent jurisdiction to proceed any further, an application may be filed under Section 14(2) to the Court to decide on the termination of his/her mandate on this ground. As opposed to this, in a challenge where grounds stated in the Fifth Schedule are disclosed, which give rise to justifiable doubts as to the arbitrator's independence or impartiality, such doubts as to independence or impartiality have to be determined as a matter of fact in the facts of the particular challenge by the Arbitral Tribunal under Section 13. If a challenge is not successful, and the Arbitral Tribunal decides that there are no justifiable doubts as to the independence or impartiality of the arbitrator/arbitrators, the Tribunal must then continue the arbitral proceedings under Section 13(4) and make an award. It is only after such award is made, that the party challenging the arbitrator's appointment on grounds contained in the Fifth Schedule may make an application for setting aside the arbitral award in accordance with Section 34 on the aforesaid grounds. It is clear, therefore, that any challenge contained in the Fifth Schedule against the appointment of Justice Doabia and Justice Lahoti cannot be gone into at this stage, but will be gone into only after the Arbitral Tribunal has given an award. Therefore, we express no opinion on items contained in the Fifth Schedule under which the appellant may challenge the appointment of either