What do the tasks for an instrument proficiency check (IPC) adhere to?

The tasks for an instrument proficiency check (IPC) adhere to the appropriate Instrument rating airman certification standards (ACS) because the ACS outlines the necessary skills, knowledge, and attitudes required for an applicant to demonstrate proficiency in instrument flying. It serves as a comprehensive guide that evaluates a pilot’s ability to perform various tasks essential for safe and effective instrument flight. The IPC is designed to ensure that pilots remain proficient and up-to-date with the skills that meet regulatory and safety standards, and the ACS provides the framework to assess this proficiency accurately.

While other options might seem relevant, they do not provide the structured and standardized criteria necessary for an IPC. The specific instrument flight handbook offers operational procedures but is not a regulatory standard. Common FAA regulations govern broad aspects of aviation activities but do not specifically outline the tasks for an IPC. The flight instructor's personal standards can vary significantly and are not a reliable or formalized measure for proficiency checks. Therefore, adhering to the Instrument rating airman certification standards ensures that the IPC maintains a uniform standard that is recognized and accepted within the aviation community.