In addition to this, students from law colleges all over the country are given the opportunity to act as 'legal trainees' under Supreme Court judges during their vacation periods. The institution of law clerks is still a recent development in the context of the Indian judiciary. Anecdotal references indicate that some justices are hesitant to rely on 'law clerks' on account of concerns with confidentiality, especially in politically sensitive disputes. However, their services are heavily relied on to go through the written submissions in order to prepare for the preliminary hearings that are held to decide whether a case should be admitted for a regular hearing on merits. In recent years, the contributions of law clerks to research for judicial opinions has become increasingly evident on account of increasing references to foreign precedents and academic writings.