DIN EN 228-2014 Automotive fuels – Unleaded petrol – Requirements and test methods; English version EN 228:2012, English translation of DIN EN 228:2014-10.
4 Pump marking
Information to be marked on dispensing pumps used for delivering unleaded petrol, and the dimensions of the label shall be in accordance with the requirements of national standards or regulations for the marking of pumps for unleaded petrol. Such requirements shall be set out in detail or shall be referred to by reference in a national annex to this European Standard.
Labelling shall be clearly visible, easily legible and displayed at any point where unleaded petrol with metallic additives is made available to consumers. The label shall contain: “Contains metallic additives” in the national language(s) and shall be laid down in the National Annex to this document.
It is also recommended that additional pump marking be applied for dispensing unleaded petrol containing high oxygenates ( with a maximum oxygen content of 3,7 % (m/m) ) and/or low oxygenates ( with a maximum oxygen content of 2,7 % (m/m) ).
For unleaded petrol containing high oxygenates, pump marking shall consist of easily recognised visual symbols that:
a) identify the unleaded petrol as complying with EN 228,
b) specify the RON, and
c) identify that the unleaded petrol contains high oxygenates (in this case the recommended symbol is “E10”).
For unleaded petrol containing low oxygenates, pump marking shall consist of easily recognised visual symbols that
d) identify the unleaded petrol as complying with EN 228,
e) specify the RON, and
f) identify, at the discretion of the Member State and laid down in a National Annex to this document, that the unleaded petrol contains low oxygenates.
The pumps dispensing low or high oxygenates unleaded petrol may also be marked with text in the national language(s) at the discretion of the Member State describing the characteristics of the unleaded petrol and all such requirements shall be set out in detail or referred to in a National Annex to this document.
5 Requirements and test methods
Unleaded petrol may contain up to 10,0 % (V/V) of ethanol complying with EN 15376.
When ethanol is used as a blending component, it may contain denaturants, if required by European and national regulations. These denaturants are permitted provided they do not cause harmful side effects to vehicles and fuel distribution systems.
NOTE Further advice on handling and blending oxygenates in general can be found in . Further guidance on blending oxygenates in accordance with the requirements of 2009/30/EC is given in CEN:TR 16435 .
A traceable record of biological origin is recommended. For the determination of biological origin of ethanol,an alternative is age determination, which is based on the beta(minus) decay of the radioactive carbon isotope C 14. This method  is considered too laborious for frequent testing, but it may be considered a useful tool to determine cases where the audit trail approach is contested.DIN EN 228 pdf download.