GIPS - composites beginning and ending dates

CFA Level III Portfolio Management
#1

The GIPS rules state that “All composites will have the same beginning and ending dates”.

How should I interepret this? A firm may introduce new mandates and strategies over time starting with perhaps only strategy. How can we expect that all composites have the same beginning and ending dates then? Do they mean January to Dec reporting in tables or something else?

#2

yes , the period should start and end on same date. The years of course may not and need not