(Spanish legislation) It must be noted that Air-Rops comply with Royal Decree 1215/1997 (Minimum safety and health requirements for the use of work equipment at work) (EU legislation) Several Air-Rops have been designed and tested according to different tractor masses that comply with all test codes for tractors. These codes are applied at present in all OECD countries and also in the European Union. The structures have been assessed by computer programs "DASTEREMA.xls" (Arana et al.2008) for front ROPS and "TASTEREMA.xls" for ROPS fitted behind driver's position. Also the finite element computer program "ANSYS WORKBENCH 14.0" has been used to predict ROPS behavior during static tests, evaluating deformations produced in ROPS. Last August 2013 the structures were tested according to OECD Standard Codes 6 and 7 in the OECD official Testing Station EMA in Madrid and the results were very satisfactory.