ADA compliance isn’t a set-it-and-forget-it thing. Compliance standards must be followed and will evolve just as your website does. There are guidelines all website contributors must know to stay within ADA guidelines. It is generally not burdensome but it does require some web managers to change their workflows. For example, loading images up to your ecommerce site will always need some of that alternative text (alt tags) mentioned above.
Since the introduction of the Americans with Disabilities Act (ADA) in 1990, physically impaired individuals have been taking advantage of this civil law to protect their rights to receive the same quality of services and products as every other individual. Website accessibility standards were set forth, and it was not long before the first lawsuit regarding accessibility of web services was filed.
An "adaptable dwelling unit" is a dwelling unit in a building with a building entrance on an accessible route designed in such a manner that the public and common use areas are readily accessible to and usable by a person with a disability, and all doors are designed sufficiently wide to allow passage into and within all premises by persons who use wheelchairs as required by the building code.
Settlements like these were entered into across the country, and 2015 included: edX, Inc. and Carnival Cruise Lines (Carnival Corp.). Needless to say, by the mid to early 2010s, the DOJ were well aware of website accessibility issues and knew exactly where it stood on these issues. In the fall of 2014, the DOJ issued a Statement of Regulatory Priorities stating, “the Department received approximately 440 public comments and is in the process of reviewing these comments… the Department plans to follow with the publication of the title III NPRM in the third quarter of fiscal year 2015.” That did not happen. Rather, in the fall of 2015, the DOJ decided to “extend the time period for development of the proposed Title III Web site accessibility rule and include it among its long-term rulemaking priorities. The Department expects to publish Title III Web site accessibility NPRM during fiscal year 2018.” In 2016, the DOJ requested additional public comment. And this year, the Trump Administration placed the DOJ’s rulemakings under Titles II and III of the ADA for websites, medical equipment, and furniture of public accommodations and state and local governments on the 2017 Inactive Actions list.
In short, the ADA currently offers compliance suggestions for sites, but there aren’t currently any standards that you are obligated to follow. The proposed law would make sure that websites follow WCAG 2.0 guidelines, which were designed and set up by the World Wide Web Consortium, an international group aimed at creating global website standards.