Communique 017 serves to clarify the differences between categories in
1. UCI/SCF license (Cat 1, 2a, 2b, and 3) and,
2. Ability based racing system. (Cat A, B, C, D, and E)
The detailed document can be found here.
SCF recommends the community to frequently check out the Communique section at cycling.org.sg for announcements and dissemination of official information.