This document provides an analysis of Rule 6 of the Cenvat Credit Rules, 2004 regarding restrictions on cenvat credit for manufacturers and output service providers. It summarizes the key aspects of Rule 6(3) including the two options for reversing common cenvat credit pertaining to exempted goods and services - paying a fixed percentage of value or determining it based on a formula. The document also includes case studies to illustrate the application of Rule 6(3)(i) for different scenarios.