What is one requirement for a stocked handwashing sink?

One requirement for a stocked handwashing sink is the availability of hand soap. The sink should always have a sufficient amount of hand soap available for users to wash their hands properly. The soap must be easily accessible and not in a place that could contaminate it, such as directly beneath the faucet or sink basin. Additionally, the soap should be a liquid, gel, or foam rather than a bar of soap, which can be unhygienic if not handled correctly. This requirement is crucial for maintaining proper hygiene and preventing the spread of germs, bacteria, and viruses.