Visibility

Visibility in the United States

Visibility in Environmental Law

An air quality value relating to pollutants that af feet the ability to see clearly. In 1977, Congress added a provision to the Clean Air Act to regulate manmade visibility problems for Class I areas, such as international parks, national wilderness areas, national parks, and national monuments.

Air pollution sources near Class I areas must use the best available retrofit technology if they interfere with visibility. New sources must obtain a permit, and the EPA is required to consider how the proposed activity will affect visibility. The federal land manager for the Class I area, either the National Park Service or the Forest Service, can participate in the permitting process, and they often insist on an offset of visibility impacting pollutants to ensure that the new source will not cause a visibility problem.
Based on “Environment and the Law. A Dictionary”.

Visibility: Open and Free Legal Research of US Law

Federal Primary Materials

The U.S. federal government system consists of executive, legislative, and judicial branches, each of which creates information that can be the subject of legal research about Visibility. This part provides references, in relation to Visibility, to the legislative process, the federal judiciary, and the primary sources of federal law (cases, statutes, and regulations).

Federal primary materials about Visibility by content types:

Laws and Regulations

US Constitution
Federal Statutory Codes and Legislation

Federal Case Law and Court Materials

U.S. Courts of Appeals
United States courts of appeals, inclouding bankruptcy courts and bankcruptcy appellate panels:

Federal Administrative Materials and Resources

Presidential Materials

Materials that emanate from the President’s lawmaking function include executive orders for officers in departments and agencies and proclamations for announcing ceremonial or commemorative policies. Presidential materials available include:

Executive Materials

Federal Legislative History Materials

Legislative history traces the legislative process of a particular bill (about Visibility and other subjects) for the main purpose of determining the legislators’ intent behind the enactment of a law to explain or clarify ambiguities in the language or the perceived meaning of that law (about Visibility or other topics), or locating the current status of a bill and monitoring its progress.

State Administrative Materials and Resources

State regulations are rules and procedures promulgated by state agencies (which may apply to Visibility and other topics); they are a binding source of law. In addition to promulgating regulations, state administrative boards and agencies often have judicial or quasi-judicial authority and may issue administrative decisions affecting Visibility. Finding these decisions can be challenging. In many cases, researchers about Visibility should check state agency web sites for their regulations, decisions, forms, and other information of interest.

State rules and regulations are found in codes of regulations and administrative codes (official compilation of all rules and regulations, organized by subject matter). Search here:

State opinions of the Attorney General (official written advisory opinions on issues of state law related to Visibility when formerly requested by a designated government officer):

Tools and Forms

Law in Other Regions

*This resource guide is updated frequently. However, if you notice something is wrong or not working, or any resources that should be added, please notify us in any of the "Leave a Comment" area.

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