"Many employers working with vendors to accomplish Affordable Care Act (ACA) reporting have received questionnaires from their vendors, making inquiries related to how the employer is complying with the employer mandate. Some of these questions include who the employer treats as eligible, how the employer determines full-time employees, what periods of time the employer is using for measurement, administrative and stability periods (where the employer is using the look-back measurement method), and more. Some of these questions are bewildering to the employer and often are not well explained in the vendor's questionnaire."