| 8 Jan 2014 | Process of the GFV HDDF Retrofit Activity (RDW) | GFV-30-02 | 2014-01-08 | 
         
            | 8 Jan 2014 | L-NGV Regulatory Update (NGV) | GFV-30-03 | 2014-01-08 | 
         
            | 8 Jan 2014 | Oustanding Issues List for HDDF Retrofit Activity | GFV-30-04 | 2014-01-08 | 
         
            | 10 Jan 2014 | Minutes of the 29th GFV informal group session | GFV-29-10/Rev.1 | 2014-01-10 | 
         
            | 27 Jan 2014 | Agenda for the 31st GFV informal working group session | GFV-31-01 | 2014-01-27 | 
         
            | 27 Jan 2014 | Report of the 30th GFV informal working group | GFV-30-05 | 2014-01-27 | 
         
            | 25 Feb 2014 | Retrofit Heavy Duty Dual Fuel Systems: Review of Open Issues (LG Europe and WLPGA) | GFV-31-02 | 2014-02-25 | 
         
            | 25 Feb 2014 | Report of the 31st GFV informal working group session | GFV-31-03 | 2014-02-25 | 
         
            | 22 Mar 2014 | Draft agenda for the 32nd GFV informal group session | GFV-32-01 | 2014-03-22 | 
         
            | 31 Mar 2014 | Draft new Regulation concerning the approval of LPG or NG dual fuel retrofit systems and dual fuel retrofitted engines (LG Europe) | GFV-32-02 | 2014-03-31 | 
         
            | 4 Apr 2014 | Working draft regulation on the approval of dual fuel retrofit systems (ACEA) | GFV-32-03 | 2014-04-04 | 
         
            | 28 Apr 2014 | Draft agenda for the 33rd GFV informal group session | GFV-33-01 | 2014-04-28 | 
         
            | 16 May 2014 | Heavy-duty dual fuel systems regulation: Open issues list as of 3 April 2014 | GFV-33-02 | 2014-05-16 | 
         
            | 16 May 2014 | Heavy-duty retrofit dual fuel systems: Working draft text of the proposed regulation | GFV-33-03 | 2014-05-16 | 
         
            | 16 May 2014 | Minutes of the 32nd GFV informal group session | GFV-32-08 | 2014-05-16 | 
         
            | 16 May 2014 | Heavy-duty retrofit dual-fuel systems: Conformity of Production principles | GFV-32-05 | 2014-05-16 | 
         
            | 16 May 2014 | Heavy-duty retrofit dual-fuel systems regulation: Open issues list | GFV-32-04 | 2014-05-16 | 
         
            | 16 May 2014 | Heavy-duty dual-fuel systems regulation: In-service Conformity and liabilities principles | GFV-32-06 | 2014-05-16 | 
         
            | 16 May 2014 | Heavy-duty dual-fuel retrofit system draft regulation as of 3 April 2014 (LG Europe) | GFV-32-07 | 2014-05-16 | 
         
            | 21 May 2014 | Procedure proposal for Euro V legislation (EuroGas) | GFV-33-04 | 2014-05-21 | 
         
            | 24 May 2014 | Draft agenda for the 34th GFV informal working group session | GFV-34-01 | 2014-05-24 | 
         
            | 29 May 2014 | Retrofit systems type approval principles (LG Europe) | GFV-33-05 | 2014-05-29 | 
         
            | 3 Jun 2014 | Progress report on the GFV heavy-duty dual-fuel systems activity | GFV-34-02 | 2014-06-03 | 
         
            | 3 Jun 2014 | Heavy-duty retrofit dual fuel systems: Working draft text of the proposed regulation | GFV-33-06 | 2014-06-03 | 
         
            | 24 Jun 2014 | Draft minutes of the 33rd GFV informal group session | GFV-33-07 | 2014-06-24 | 
         
            | 27 Aug 2014 | Minutes of the 34th GFV informal group session | GFV-34-03 | 2014-08-27 | 
         
            | 17 Oct 2014 | Draft agenda for the 35th GFV informal group session | GFV-35-01 | 2014-10-17 | 
         
            | 9 Nov 2014 | HDDF open issues list | GFV-35-02 | 2014-11-09 | 
         
            | 3 Dec 2014 | Draft agenda for the 36th GFV informal working group session | GFV-36-01 | 2014-12-03 |