New Delhi, May 21 (ANI): RBI governor Raghuram Rajan has reiterated his call for fiscal discipline. Rajan stated that it is essential for the country to achieve sustainable economic growth. Although the comments were part of a broader speech on public sector banks, they come as India's newly elected government led by Narendra Modi is set to face its first credibility test with markets when it delivers a budget by July. Rajan repeated his call while noting that India would not always be able to rely on banks to buy a large portion of its government debt as it usually does. Banks, in turn, raise the funds needed to buy the bonds by attracting deposits from retail investors.