Explanation:

Master of roster

• ‘Roster’ as ‘a list of people’s names and the jobs they have to do at a particular time.’ Thus, ‘Master of Roster’ becomes ‘A man who decides such list.’ 
• In the Indian legal context, the ‘Master of Roster’ refers to the administrative power of the Chief Justice of India and the Chief Justices of the High Courts to allocate the matters that other judges shall be hearing, respectively.
• Article 145 of the Indian Constitution provides power to the Supreme Court to frame its own rules to regulate the practice and procedure of the Court.

Hence only statement 1st is correct.