LFFF NOTAM

[Kortin]

Q) LFFF/QFALT/IV/NBO /A /000/999/4846N00412E
A) LFOK
B) 20/12/09 15:22 C) 21/03/09 23:59
E) AD PROHIBITED FOR ACFT ACFT OF CLASS 6 AND MORE OUTSIDE RFFS LVL 7 HOURS

OUTSIDE RFFS LVL 7 HOURS - What does it mean?

[Musket90]

Maybe it means outside the published hours that RFFS CAT 7 (level 7) applies.as detailed in the AIP.