Final answer:
The Compliance Officer is primarily responsible for ensuring an organization complies with GPC policies and practices, supported by the oversight of the Board of Directors.
Step-by-step explanation:
The individual who ensures the organization is complying with GPC policies and practices is typically the Compliance Officer. However, the Board of Directors is the first line of corporate governance and oversight for top executives, as they are elected by shareholders to align the company's actions with shareholder interests.
Although the CEO, Human Resources Department, and other personnel hold significant roles in maintaining compliance within their respective domains, the Compliance Officer is specifically tasked with ensuring policies and practices are followed and that the company adheres to legal and ethical standards.