Persons with reduced mobility find them useful, as do those with weak legs, as a higher toilet bowl makes it easier for them to stand up.
The U.S. Department of Justice published revised regulations for Titles II and III of the Americans with Disabilities Act of 1990 "ADA" in the Federal Register on September 15, 2010.
Additionally, there is the important ADA requirement of clear floor space at water closet rooms.
In the United Kingdom, the Equality Act 2010 requires organizations and businesses to make reasonable adjustments to meet the needs of people with disabilities.
Some countries and regions have a scheme of standardised locks, with non-profit organisations selling keys to disabled people.