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.
Title II of the ADA and Section 504 Complaints - The Office for Civil Rights (OCR) in the Department of Education enforces Title II of the ADA and Section 504 as they apply to education. Those who have had access denied due to a service animal may file a complaint with OCR or file a private lawsuit in federal court. An OCR complaint must be filed within 180 calendar days of the date of the alleged discrimination, unless the time for filing is extended for good cause. Before filing an OCR complaint against an institution, an individual may want to find out about the institution’s grievance process and use that process to have the complaint resolved. However, an individual is not required by law to use the institutional grievance process before filing a complaint with OCR. If someone uses an institutional grievance process and then chooses to file the complaint with OCR, the complaint must be filed with OCR within 60 days after the last act of the institutional grievance process.
Error prevention on important forms (3.3.4): For pages that create legal commitments or financial transactions or any other important data submissions, one of the following is true: 1) submissions are reversible, 2) the user has an opportunity to correct errors, and 3) confirmation is available that allows an opportunity to review and correct before submission.
I should mention one caveat to all of this. Businesses that are required to comply but don't have the ability to bring their websites into compliance can provide an accessible alternative to provide the same information, goods, and services that they provide online, like a staffed phone line. The trick, however, is that this option has to provide at least equal access, including in terms of hours of operation. And, as we know, the internet is around 24/7, so good luck with that.
The first step would be to review ADA compliance requirements and document how your current website measures up. You can run free test by visiting WAVE Web Accessibility Tool Website to see if you have errors regarding website accessibility. This is an online report that will show errors and alerts, and some of them you must test manually to confirm if they are an actual error or not. For example, if it shows an issue with all posted PDFs, you would have to check each PDF individually to see if it is indeed non-compliant.
For most businesses, the need for ADA web compliance means they will need to make at least some adjustments to all of their online marketing strategies. For instance, if your company provides tax preparation services, all of the tax forms you provide for customers to download would need to meet accessibility standards. Any online tax preparation services that you offer would also need to be configured so they meet ADA standards, as would your mobile app.