5 March 2015
A project can issue CO2-certificates only within its crediting period. The crediting period cannot start before the project start, but may start after.
If a project has its Initial Certification later than the project start, retroactive crediting of up to 3 years is possible. In the case that new areas are added to a project (New Area Certification), its crediting period may not be moved earlier to the date of the existing crediting period.
Read more here.