All Ops Specs should say CL-65 on it cuz thats what the FAA calls it. If your asking why its called that its because the original manufacturer "Canadair" designated "CL" for all of their products.
The "65" is the amount of souls that Canadair says it can legally hold. 50 passengers, 3 crew members and 12 lap children (12 cuz the right side of the A/C has the third o2 mask in every row...and their are only 12 rows on that side.)