How long could Andriy Grivko be suspended for after punching Marcel Kittel?

Astana rider Andriy Grivko could be suspended for a lengthy period of time by the UCI after punching Marcel Kittel on stage three of the Dubai Tour.

Andriy Grivko could be suspended from racing for up to six month, face a substantial fine, and be excluded from the World Champs for punching Marcel Kittel.