The short version, for anyone who has not been following closely.
The rules are not new. What is new is how many people they now apply to.
What it costs
The exceptions matter more than the rule, and there are three of them. There is a deadline involved, and missing it costs more than the difference.
What to check first
The exceptions matter more than the rule, and there are three of them. The figures move about, but the direction has been the same for three years.
The short answer: check the date, then check the figure, then decide.