The document outlines the Standard Operating Procedure (SOP) for processing change requests from various stakeholders in the National Pension System (NPS) administered by Karvy Computershare Pvt. Ltd. It details the roles of different intermediaries, including nodal offices and the Central Record-Keeping Agency (CRA), in managing subscriber registrations, contributions, and updates in personal information. Specific procedures for various types of change requests, both commercial and non-commercial, are provided, along with guidelines for how subscribers can submit these requests online or in written form.