It takes place every four years, typically in the country that also hosts the FIFA World Cup.
It is organized by the International Sports Federation for Persons with Intellectual Disability (INAS-FID) which also organizes championships in other sports.
To participate in an INAS-FID event, an athlete must have an intellectual disability that was evident before the age of 18, significant limitations in adaptive behavior, and an IQ score below 75.
[1] The latter requirement led to controversy in 2006, when third-placed Germany was disqualified because the employed IQ tests did not accord with international standards.
[2] This article about an association football competition is a stub.