Which of the following is a requirement for statutory monetary benefits?

Statutory monetary benefits must comply with federal regulations because these regulations establish the minimum standards that employers must adhere to when providing benefits to employees. This compliance is crucial to ensure that employees receive protections and entitlements that are mandated by law, such as minimum wage, unemployment insurance, and workers’ compensation. These laws are designed to safeguard employees' rights and provide them with financial support in various situations, highlighting the importance of federal regulation in the implementation of these benefits.

Other options, while they may seem relevant to workplace benefits, do not fulfill the fundamental requirement as defined by statutory obligations. Employer approval is not a necessary condition since statutory benefits are imposed by law rather than being contingent on individual employer policies. Consistent employment duration can affect eligibility for some benefits but it is not a universal requirement across all statutory monetary benefits. Likewise, voluntary opt-in by the employee does not apply, as statutory benefits are typically mandated and automatically provided without requiring voluntary acceptance by the employee.