code/datums/elements/skill_reward.dm

/datum/element/skill_reward	An element that forbids mobs without a required skill level from equipping the item.
/datum/element/skill_reward/veteran	Welp, the code is pretty much the same, except for one tiny detail, I suppose it's ok to make a subtype of this element. That tiny detail is that we don't check for skills, but if the player has played for thousands of hours.