WCAG guidelines break accessibility issues down into three levels. Level A issues are the most urgent and include problems that can severely limit a disabled visitor’s ability to navigate or use the website. Level AA issues tend to be more rooted in functionality, addressing areas where improvement is needed to give disabled users the full experience of a site. (Level AA is considered the target standard for most commercial websites.) Level AAA issues are the highest standard, fine-tuning and expanding on issues identified as Level A and AA. While it is an excellent goal, full Level AAA compliance is likely beyond the reach of most websites.
A person traveling with a service animal cannot be denied access to transportation, even if there is a “no pets” policy. In addition, the person with a service animal cannot be forced to sit in a particular spot; no additional fees can be charged because the person uses a service animal; and the customer does not have to provide advance notice that s/he will be traveling with a service animal.
These and other types of multimedia can present two distinct problems for people with different disabilities. People who are deaf or hard of hearing can generally see the information presented on webpages. But a deaf person or someone who is hard of hearing may not be able to hear the audio track of a video. On the other hand, persons who are blind or have low vision are frequently unable to see the video images but can hear the audio track.
Any business that is considered a “place of public accommodation” is required to provide equal access to services under the nondiscrimination requirements of Title III of ADA. When you look at the guidelines closely, this includes hotels, entertainment venues, legal and accounting firms, retail stores, and virtually every business that is not a private club, including businesses that exist solely on the web.
Certain specific conditions that are widely considered anti-social, or tend to result in illegal activity, such as kleptomania, pedophilia, exhibitionism, voyeurism, etc. are excluded under the definition of "disability" in order to prevent abuse of the statute's purpose.[8][9] Additionally, gender identity or orientation is no longer considered a disorder and is also excluded under the definition of "disability".[9][10]

A. The ADA applies to housing programs administered by state and local governments, such as public housing authorities, and by places of public accommodation, such as public and private universities.  In addition, the Fair Housing Act applies to virtually all types of housing, both public and privately-owned, including housing covered by the ADA.  Under the Fair Housing Act, housing providers are obligated to permit, as a reasonable accommodation, the use of animals that work, provide assistance, or perform tasks that benefit persons with a disabilities, or provide emotional support to alleviate a symptom or effect of a disability.  For information about these Fair Housing Act requirements see HUD’s Notice on Service Animals and Assistance Animals for People with Disabilities in Housing and HUD-funded Programs.
There are exceptions to this title; many private clubs and religious organizations may not be bound by Title III. With regard to historic properties (those properties that are listed or that are eligible for listing in the National Register of Historic Places, or properties designated as historic under state or local law), those facilities must still comply with the provisions of Title III of the ADA to the "maximum extent feasible" but if following the usual standards would "threaten to destroy the historic significance of a feature of the building" then alternative standards may be used.
Ensure that in-house staff and contractors responsible for webpage and content development are properly trained. Distribute the Department of Justice technical assistance document “Accessibility of State and Local Government Websites to People with Disabilities” to these in-house staff and contractors on an annual basis as a reminder. This technical assistance document is available on the ADA Home Page at www.ada.gov. 

In 1986, the National Council on Disability had recommended the enactment of an Americans with Disabilities Act (ADA) and drafted the first version of the bill which was introduced in the House and Senate in 1988. The final version of the bill was signed into law on July 26, 1990, by President George H. W. Bush. It was later amended in 2008 and signed by President George W. Bush with changes effective as of January 1, 2009.[3]
This past September marked the first time a judge ruled that the ADA applies even to businesses without a physical location. Scribd, an e-book subscription service is considered to provide "a place of public accommodation." Their services are not accessible to blind persons because they cannot be read with a screen reader. The judge reasoned, "Now that the Internet plays such a critical role in the personal and professional lives of Americans, excluding disabled persons from access to covered entities that use it as their principal means of reaching the public would defeat the purpose of this important civil rights legislation."

A. In situations where it is not obvious that the dog is a service animal, staff may ask only two specific questions: (1) is the dog a service animal required because of a disability? and (2) what work or task has the dog been trained to perform? Staff are not allowed to request any documentation for the dog, require that the dog demonstrate its task, or inquire about the nature of the person's disability.
Other animals – According to the ACAA, airlines are not required otherwise to carry animals of any kind either in the cabin or in the cargo hold. Airlines are free to adopt any policy they choose regarding the carriage of pets and other animals (for example, search and rescue dogs) provided that they comply with other applicable requirements (for example, the Animal Welfare Act).
• Understandable: Make sure it's easy for all users to comprehend the information on your website. Recommendations include making the text readable — which includes using a mechanism to help identify definitions of words or phrases used in unusual ways — expanding abbreviations and including language that's at the lower secondary education level, if possible, or making available a version that doesn't require advanced reading ability. The WCAG 2.1 offers additional insight on how to make your website understandable.
HTML tags – specific instructions understood by a web browser or screen reader. One type of HTML tag, called an “alt” tag (short for “alternative text”), is used to provide brief text descriptions of images that screen readers can understand and speak. Another type of HTML tag, called a “longdesc” tag (short for “long description”), is used to provide long text descriptions that can be spoken by screen readers.
Real-time captioning (also known as computer-assisted real-time transcription, or CART) is a service similar to court reporting in which a transcriber types what is being said at a meeting or event into a computer that projects the words onto a screen. This service, which can be provided on-site or remotely, is particularly useful for people who are deaf or have hearing loss but do not use sign language.
A. The dog must be trained to take a specific action when needed to assist the person with a disability. For example, a person with diabetes may have a dog that is trained to alert him when his blood sugar reaches high or low levels. A person with depression may have a dog that is trained to remind her to take her medication. Or, a person who has epilepsy may have a dog that is trained to detect the onset of a seizure and then help the person remain safe during the seizure.
In addition to the provisions about service dogs, the Department’s revised ADA regulations have a new, separate provision about miniature horses that have been individually trained to do work or perform tasks for people with disabilities. (Miniature horses generally range in height from 24 inches to 34 inches measured to the shoulders and generally weigh between 70 and 100 pounds.) Entities covered by the ADA must modify their policies to permit miniature horses where reasonable. The regulations set out four assessment factors to assist entities in determining whether miniature horses can be accommodated in their facility. The assessment factors are (1) whether the miniature horse is housebroken; (2) whether the miniature horse is under the owner’s control; (3) whether the facility can accommodate the miniature horse’s type, size, and weight; and (4) whether the miniature horse’s presence will not compromise legitimate safety requirements necessary for safe operation of the facility.
The handler is responsible for the care and supervision of his or her service animal. If a service animal behaves in an unacceptable way and the person with a disability does not control the animal, a business or other entity does not have to allow the animal onto its premises. Uncontrolled barking, jumping on other people, or running away from the handler are examples of unacceptable behavior for a service animal. A business has the right to deny access to a dog that disrupts their business. For example, a service dog that barks repeatedly and disrupts another patron’s enjoyment of a movie could be asked to leave the theater. Businesses, public programs, and transportation providers may exclude a service animal when the animal’s behavior poses a direct threat to the health or safety of others. If a service animal is growling at other shoppers at a grocery store, the handler may be asked to remove the animal.