Which of the following is NOT a requirement for qualified plans under ERISA?

Maximum contribution limits are not a requirement for qualified plans under the Employee Retirement Income Security Act (ERISA). While ERISA does set certain guidelines and standards for the establishment and management of qualified retirement plans, it does not impose specific limits on how much an employee or employer can contribute to these plans at the federal level.

On the other hand, minimum participation standards require plans to have rules in place ensuring that a certain number of employees can participate, and minimum vesting standards ensure that employees have a right to a portion of their retirement benefits after fulfilling specific requirements. Funding requirements mandate that plans maintain sufficient funds to meet the promised benefits, thereby protecting participants' interests. Each of these aspects is critical for the protection of plan participants and ensuring that retirement plans operate fairly and effectively.