Document GRE/2014/13 proposes to ensure that the introduction of the new class F marking materials does not conflict with the mandatory requirements for existing class C materials. The addition of Class F brings markings required under certain countries’ national legislation within the UN regulatory system. However, Japan actually prohibits the use of white retro-reflective markings on the rear of vehicles. Therefore, Japan proposes the addition of a footnote confirming the right of Contracting Parties to prohibit the use of Class F markings under national legislation.