The new law makes it almost impossible for Remus Lupin to get a job.
We are only told that the legislation was created in 1993 (OP14). It was probably written and made law during the first half of that year because Lupin was clearly very much down-and-out by September first of that year (PA5), and it was a big deal that Dumbledore hired him (PA22).
Rowling has said that Lupin's struggles with lycanthropy are a metaphor for society's feelings towards people with disabilities or illnesses (Scot). Employment discrimination is a specific challenge faced by people with disabilities, and it was legal in the UK until the implementation of the Disability Discrimination Act of 1995 (source: Wikipedia). -BB