When does new black operation box open ? (Character missions)

[Veerle D'hanis]

Huston, we have a problem .
A question rather, on which we would like an answer

On the charactertab, the 4th item, where you can do the missions to get items to "dress" your character. When does the 3rd black boss open ? On which level ?

Perhaps a higher level player knows the answer ?

Thank you for your answer