Translations:Item Affixes/45/en
This has the effect of reducing the minimum ilvl needed for an affix to spawn on any item that has a magic level. For example, a tiara can get +2 to class skills at ilvl 77 rather than needing to be ilvl 90+. Diadems are an interesting case here - they have such a high qlvl and maglvl that their ilvl is irrelevant and their alvl is always 99.