GIPS - 5Y to 10Y including, present, question, increase, standards

cjs238

Under the GIPS standards, we must present at least 5 years of GIPS compliant performance data, then gradually increase this to up to 10 years.

Question is after the first 5 years of GIPS compliant data, must you increase this to up to:
a) 10 historical years (including these first 5 years)
b) 5 future years (plus these first 5 years to make it 10 years in total)
c) a mixture of historical and future years as long as it adds up to 10 years in total

This is a genuine question I have - not from any MC test!