The ECF is regularly asked about whether or not certain changes to the Laws of Chess are permitted in order for a competition to be graded. Therefore, a set of competition rules is being published that sets out the variances tolerated for these purposes. It also includes information stored separately on various other documents in order to unite all of this information in one place.
The full ECF Competition Rules can be found here or via the link above [Grading menu]
— Alex Holowczak, Director of Home Chess – 3rd January, 2016