mob_drops lvl limit

[SeNoR 0]

Hey, i use the code: 

Group Kummers
{
Mob 8001
Type limit
level_limit 1
1 49016 1 100
2 71084 15 100
}

and i want a limit for the dropps (start drops = lvl 1. End of drops = lvl 30.)  level_limit is for starting drop lvl.

what is the code for that?

(sorry for my bad english xD)