What is the role of Parliament with respect to regulating the recruitment and conditions of service for those appointed to any all-India service created under Article 312?
The role of Parliament with respect to regulating the recruitment and conditions of service for those appointed to any all-India service created under Article 312 is as follows:

1. If the Council of States has declared by resolution supported by not less than two-thirds of the members present and voting that it is necessary or expedient in the national interest so to do, Parliament may by law provide for the creation of one or more all India services (including an all-India judicial service) common to the Union and the States.

2. The law providing for the creation of the all-India judicial service aforesaid may contain such provisions for the amendment of Chapter VI of Part VI as may be necessary for giving effect to the provisions of that law and no such law shall be deemed to be an amendment of this Constitution for the purposes of article 368.