if you want, you can level up a weapon in market wether you have the right attribute points or not (same for proficiency) so a tao can have a weapon at any level, but if they unequip it they cant re equip it. (i found out when i leveld my archers bow to 95 then realised i only had the proficiency for the level 85 bow[after haloween quest, i leveld from 89-99 and upgraded my bow T_T])