The obligation is not only your website
Web accessibility litigation gets the attention because it is cheap to file. Title III itself reaches into how the organization operates, and a business can hold a conformant site and still be out of compliance on every item below.
Title III reaches twelve categories of private entity, which together cover most businesses open to the public: places of lodging, establishments serving food or drink, places of exhibition or entertainment, places of public gathering, sales or rental establishments, service establishments, stations used for public transportation, places of public display or collection, places of recreation, places of education, social service center establishments, and places of exercise or recreation.
Policies, practices and procedures
Reasonable modification of the way things are normally done, where the usual way excludes someone. Booking rules, queueing, documentation requirements, service animal policy and attendance conditions all sit here.
28 CFR 36.302
Effective communication
Auxiliary aids and services so that communication is as effective as it is for everyone else. Interpreters, captioning, alternate formats, and a working way to request them before the appointment rather than at the door.
28 CFR 36.303
Barrier removal in existing facilities
Removal of architectural barriers where it is readily achievable, documented as a survey with a priority order, so the decisions are recorded rather than reconstructed later.
28 CFR 36.304
Staff practice
The person at the counter, on the phone and at the door. Most complaints begin with a staff response, not a line of code, and training with a record of who received it is the cheapest control available.
Program and training
Employment
Title I applies to employers with fifteen or more employees, independently of Title III. Application systems, onboarding platforms, internal tools, and the accommodation process behind them.
29 CFR Part 1630
Nonprofits with federal funding
A nonprofit receiving federal financial assistance carries Section 504 obligations in parallel with Title III, on a stated conformance date rather than an open-ended one.
Section 504
Whichever half is missing, the practice can be engaged for it. Program oversight of the kind a Chief Accessibility Officer or accessibility program director would carry, digital conformance oversight of the kind a certified tester would carry, or both under one signature.