Interesting release I received yesterday, which is actually dated February. 5 point harnesses are no longer FIA acceptable from Feb 2018 on. For all FIA regulated motorsport NEW harnesses must be to the new 8853:2016 standard. The hologram label will be gold, rather than the previous silver ones.
Quoted from the release
"4 point harness to the OLD 8854:98 standard , this can only be used in certain historic championships if their regulations allow it. They can still be purchased new however ONLY to the old 8854:98 standard.
5 point harness these can can continue to be used under the old 8853:98 standard if they are within date. They CANNOT be purchased new as of January 2018.
6 point harness, these are the ONLY harness allowed under the NEW 8853:2016 FIA standard . Also they are only allowed with a moustache crutch strap, NO V straps allowed.
For 2018 1pt and 2pt crutch straps CANNOT be purchased as a separate item to be added to 2018 dated 4 point harnesses."

End of quote.