All land is subject to federal, state, and local regulations. In addition, private restrictions can be placed on a property as a condition of sale. As an example, federal regulations govern environmental impact. State laws typically discuss access to property and procedures for changing property boundaries. Local laws cover zoning rules, and everything from historical preservation to noise levels. Private restrictions are often employed by developers who want their developments to maintain a cohesive look or feel. Developments may employ restrictive covenants to enforce everything from garage size and house design to color schemes and lawn decorations.