The constitution is silent on the exact regulation of the countersigning.

The President can also, only once per law and with the countersigning of the Prime minister, send the law back to parliament for another review.

On 29 April 2007 came the countersigning of the partnership document in the Wörth Shipping and Shipbuilding Museum.

Basing on the countersigning of the papal bulls between November 11 and December 16, 1185 the list of his electors is reconstructed as follows:

Basing on the countersigning of the papal bulls in October 1187 it is possible to establish that probably 13 of them participated in the election of successor of Urban III:

Basing on the countersigning of the papal bulls in December 1187 it is possible to establish that only 9 cardinals were present at the death of Gregory VIII at Pisa: