Class C Reserve Service
From Army.ca Wiki
Per QR&O 9.08,
A member of the Reserve Force is on Class "C" Reserve Service when the member is on full-time service and is serving
with approval by or on behalf of the Chief of the Defence Staff in a Regular Force establishment position or is supernumerary to Regular Force establishment; or
on either an operation or an operation of a type approved by or on behalf of the Chief of the Defence Staff.
For the purpose of subparagraph (1)(b), "operation" includes training and other duties necessary for the operation, and leave related to the operation.
Class "C" Reserve Service includes proceeding to and returning from the place of duty.