Regulation (K)3 in the MSA Yearbook has been amended to require all fire extinguishers to be serviced in accordance with the manufacturers' guidelines, or every 24 months, whichever is sooner. This regulation change was ratified by Motor Sports Council for 1 January 2018 implementation. Please see the regulation wording at the bottom of the page.
Unfortunately, there was an error in the rule changes notification sheet published in October 2017, which indicated an incorrect date of…
Early days yet obviously, but at the end of January numbers are looking very promising indeed. Here's a list of the drivers who've registered so far: