Final answer:
Under the Affordable Care Act (ACA), there is no specific maximum percentage of employees that an employer is allowed to require to participate in a noncontributory group health insurance plan.
Step-by-step explanation:
Under the Affordable Care Act (ACA), there is no specific maximum percentage of employees that an employer is allowed to require to participate in a noncontributory group health insurance plan. The ACA requires that employers with more than 50 employees offer health insurance to their employees, but it does not dictate the percentage of employees that must participate.