Standard EN 300 220

The latest revision of EN 300 220-2 v2.1.1 was published in the OJ on 24 August 2006. This version becomes mandatory for all EN 300 220 approvals from 31  December 2007 when the presumption of conformity to the R&TTE Directive of the previous version ceases.

This means that all product manufactured after this date must comply with version 2.1.1, including the Transient Power Requirement. The new option for LBT/AFA may apply depending on the frequency band used. See ERO/ERC 70-03 frequency plan for details.
The text of the entry in the OJ can be viewed on Page 7 of this document:

http://eur-lex.europa.eu/LexUriServ/site/en/oj/2006/c_201/c_20120060824e
n00010030.pdf