The sponsorship program generates 80% of the revenue needed to operate the program. Sponsorships are at different levels and each level has its benefits.
A maximum of nine mandatory decals are possible:
The specific requirements are detailed at http://www.bmwccaclubracing.com/Information/DecalRequirements.aspx.
Cars currently emblazoned with sponsor decals larger than 50 sq in should not remove them immediately. The sponsors will be providing new decals shortly and the old ones should be used until the new ones become available. The larger decals are acceptable and encouraged; you are not required to change to the new decals.