From 1 January 2005 onwards, each registry shall contain at least one Party holding account created in accordance with Article 12.

From 1 January 2005 onwards, each Member State registry shall contain one operator holding account for each installation created in accordance with Article 15 and each registry shall contain at least one person holding account for each person created in accordance with Article 19.

From 1 January 2005 onwards, each registry shall contain one retirement account and one cancellation account for the 2005-2007 period and one cancellation account for the 2008-2012 period, created in accordance with Article 12.

From 1 January 2008 and from 1 January of the first year of each subsequent five-year period, each registry shall contain one retirement account and the cancellation and replacement accounts required by the relevant decisions adopted pursuant to the UNFCCC or the Kyoto Protocol for the 2008-2012 period and for each subsequent five-year period, created in accordance with Article 12.

Unless otherwise provided, all accounts shall be capable of holding allowances and Kyoto units.