The validation rule v7667_a checks the possible options to be reported in column 0080 (TYPE OF RETENTION APPLIED) for template C 14.00 in Annex I to the Regulation (EU) 2021/451 (ITS on supervisory reporting) . Securitisation transactions that in column 0051 report the value "x3" (K = entirely recognized) are referred to the full repurchase of the notes issued, in that the concept of retention cannot be adopted.

In the Annotated Table Layout, the domain of column 0080 for C 14.00 template is "ZZ2"; in the DPM Dictionary the value "x6" (N = Not applicable) is expected. In Annex II, this value is not directly mentioned with reference to column 0080 but in an indirect reference in the instructions to column 0090. 

Why does v7667_a ({C 14.00, c0080} in {[eba_ZZ: x7], [eba_ZZ: x8], [eba_ZZ: x9], [eba_ZZ: x10], [eba_ZZ: x11], [eba_ZZ: x12], [eba_ZZ : x13]}) accept the value "x6" when the value "x3" is reported in column 0051 for C 14.00 template?