To establish liability, an injured party must prove that the property owner did not provide a reasonably safe environment, as expected by law. There is a set of laws that apply particularly to properties or buildings, and that must be followed to maintain a safe property. Examples of these laws and codes include requirements for handrails on stairs, requirements for step height, and regulations for the tread on the stairs. Another example of such laws or codes is appropriate lighting. If property owner does not follow these laws, they may be liable for accidents on their property.