Not trying to be smart here but what's an OCCC?
It confuses me too. it is Occupant and Cargo Carrying Capacity.
All I know is what our 2007 2350 weighs empty (pre-Alcoa wheels) at home with a tank full of gasoline and propane.

Here is our weigh-in during this past trip with our new Alcoa wheels. Each Alcoa alloy wheel weighs 20 pounds less than a steel wheel for an over-all weight reduction of 80 pounds. We weighed in at 100 pounds below GVWR for our 2007 E350 chassis which is 11,500 pounds. GVWR is Gross Vehicle Weight Rating which means the max amount the rig should weigh after loading it up including occupants.

Due to our load distribution between front and rear axles, our 2007 E350's rear axle GAWR (Gross Axle Weight Rating) of 7800 pounds is exceeded by 420 pounds. I don't fret over it because of the suspension upgrades done in back with a heavy duty rear stabilizer bar, heavy duty Bilstein shocks, and a rear trac bar. Our chassis came without a rear stabilizer bar so the suspension upgrades must count for something.
Our over-weight condition would go away if we didn't carry a full tank of fresh water, but we carry it anyway. Unlike model 2350 starting in 2008, our 2007 has the fresh water tank located as far back as possible, placed against the rear wall. That throws our rear axle weight over the limit. The leverage from the tank location, amplifies the weight, making the front axle lighter. It is surely not ideal, but I think I took good care of it through the various suspension upgrades.
I share this as an example of how everyone should review their PC weight. Not only for weight limits, but also to determine what tire pressure is required for each axle.
Art & Barb are asking a great question because model 2910T is the heaviest of PCs. Know what you are getting into.