Recoding was not carried out.
There is a mix of levels in other certificates (code 6).
Accoding to the country contact person, it would be more likely to code as medium.
Since 18 percent of the population is concerned, LIS decided not to recode.

If LIS users want to pursue a recode they may do so on their own responsability.
The mapping below may serve as suggestion. 
The problematic category is pointed out.

PEDUC							     ISCED97	   LIS recode
  1  still at school								9
  2  less than secondary					0-2		1
  3  completed highest year of secondary			3		2
  4  completed secondary after left school			3		2
  5  trade certificate						3B/4B		2
  6  other certificate or diploma				3/4/5		2 or 3 ?
  7  bachelors degree or higher					5/6		3
  8  other qualification							9
  9  never went to school							1