By the way, I have one more question from this article.
Strictly speaking, is the idea that the word by-election is mainly spoken in the U.K and the word special election is mainly used in the U.S not necessarily a "fixed" idea? Because the Wiki of these words says,
By-elections, also spelled bye-elections (Ireland only) (known as special elections in the United States and the Philippines, and bypolls in India),
By-elections are held in most nations that elect their parliaments through single-member constituencies, whether with or without a runoff round. This includes most Commonwealth countries, such as the United Kingdom, Canada and Pakistan, as well as non-Commonwealth countries such as France. In the UK a writ for a by-election must be issued within three months of a vacancy arising.
But the writer is using these 2 terms randomly sometimes calling the election as by-election and sometime as special election.
I know this is not a so important question, but would by any chance the description of the Wiki be probably not necessarily universal?