Item 29 (Drawbar a separate technical unit) (R55_04_04, R55_05_02, R55_09_08; R55_10_xx; R55_11_03; R55_11_08; R55_13_05)
Since last meeting Mr. Svensson had investigated the different options to make the definition of a drawbar stricter in order to distinguish a separate technical unit. Such efforts have been made before. This was a last effort. To be very consistent it is necessary to have clear criteria how to make the judgement. This try was not successful. To summarize the situation Mr. Westphäling concluded that this is a difficult task. The best but not good enough attempt has been based on the function of a chassis and of a drawbar.

Item 30 (Simple designs) (R55_02­­_09, R55_03_06, R55_05_09, R55_07_07, R55_09_08; R55_11_03; R55_11_08; R55_13_05)
This item was also in the scope of the investigation reported under Item 29. The important issue with the discussion on “simple designs” is whether calculation based approval according the Annex 6 §1.1. is applicable or not. This procedure is very ambiguous as no statement is given about how to perform such calculations. There is however a clear statement in annex 6 §1.1. that the result of the calculations shall be the same as if the design had been tested. It has not been possible to find a generally acceptable recommendation how to calculate. One guidance/alternative may be the validation procedure set out in the directive 2007/46/EC annex XVI. No agreement could be reached on recommending only to use validated procedures. On the basis of the discussion and the investigations done, the items 29 and 30 were dropped. Mr. Gunneriusson commented that the failure to reach an agreement on those two items leaves the regulations with two major shortcomings. He announced that he would comment on this in the GRRF 82.

Minor editorial changes as in the document R55_13_05 was agreed.