Passed by the U.S. Congress in 1990, the Americans with Disabilities Act (ADA) did not account for how consumers would come to interact with businesses via the internet and apps on smartphones.

But now businesses, including hotels, which have done the work to make sure their physical properties are ADA-compliant and properly accessible to people with disabilities, must do the same for their digital properties, experts say.

That includes websites with screen readers for the blind and closed-captioning for the hearing-impaired. Failure to meet such standards often results in legal consequences.