Cars competing in Motorsport Ireland speed events(Autocross, Rallycross, Rally Sprints, Racing, Special Stage Rallying, Sprints and Hill Climbs) it must be possible to take a fuel sample. For fuel injected cars the facility must be a dry break fuel sampling coupling, approved by the FIA.

This is a new scrutineering requirement from Motorsport Ireland. The maximum octane fuel allowed in any discipline for 2020 is 102, thus to check this they are requiring the fuel sampling kit. This is the new regulation under Appendix 2 in the book, it covers all disciplines:

SCRUTINY APPENDIX 2
28.2. Fuel.

Petrol or Diesel in compliance with FIA Appendix J Art 252, Article 9. (Petrol Max 102 octane). With the exception of cars competing in road-going production category, cars competing in Motorsport Ireland speed events(Autocross, Rallycross, Rally sprints, Racing, Special Stage Rallying, Sprints and Hill Climbs)it must be possible to take a fuel sample. For fuel injected cars the facility must be a dry break fuel sampling coupling, approved by the FIA.
For all others an appropriate fitting to allow fuel sampling must be present. In addition, competitors must carry and make available a 600mm minimum length of hose to which, where necessary, the appropriate mating part is to be attached.
Cars must have sufficient fuel for a fuel test at any time during an event. Minimum volume required is 3.5 litres.