What’s an advisory circular?

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An Advisory Circular is a non-binding written communication that provides guidance on how to manage changes or interpret regulations, often used in transportation and aviation. They can be accessed for free or for a fee, and may be published by government regulatory authorities or companies. They clarify specific changes in regulations and are numbered for easy cross-referencing.

Advisory Circular is a term describing a written communication intended for a commercial business group or related government departments. Typically, an advisory circular contains guidance on how to manage changes to past work practices or how to interpret existing regulations. These advisory guidelines are generally non-binding, but are for informational purposes only. They can be mailed or emailed to a list of relevant people or available on the Internet for a fee or for free.

The term is often used in the context of transportation and aviation. This type of communication usually comes from a government regulatory authority because it controls the rules regarding airspace and transportation. For example, the United States Federal Aviation Authority (FAA) circulates “Advisory Circulars” to relevant aviation companies. They keep a computer mailing list of the names and addresses of operators who need to know the correct way to interpret new regulations.

As they are important for general safety behaviors in the areas of transport and aviation, issuing authorities may publish advisory circulars on the official website for free access. Operators wishing to obtain the information may also request multiple printed copies of the advisory circular free of charge, but bulk copies may incur a fee. Some advisory circulars need to be paid individually before sending. Another option for disseminating advice is to publish the circulars as a subscription service, where the customer has to pay for a certain period, such as one year, during which time they receive all approved advisory circulars.

Companies outside of aviation and transportation may also issue advisory circulars. In any case where a rule or regulation needs some clarification, the company can disclose it through a non-binding advisory circular. These communications originate at the highest levels of the relevant departments where decisions are made.

Generally, an advisory circular deals with clarifying a specific change in regulations. The circular is only advice on how to deal with a specific situation and does not necessarily need to be followed exactly. More than one advisory circular may be released by competent bodies in amending regulations and, as they are normally numbered for easy cross-referencing, the relevant circulars are easy for interested parties to find. This referral system also allows a customer to order the right circular for their purposes. This may also be possible for old circulars as well as new advisory communications.

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