Pontefract cake map of the 1648 Siege of Pontefract (reproduced in Chartres) the liquorice is indicated as being grown in "garths" either side of Micklegate, the street which runs between Pontefract's Market Place and the castle. In the 18th century liquorice was used as a medicine both for humans and for horses. The Pontefract cake "was almost certainly a black cake, the portable lozenge used to make 'liquorish water', stamped with the castle lodge emblem of Pontefract to signify quality. This trade mark had been employed on Pontefract cakes since 1612, when the initials 'GS' were used, and are thought to be
International Union for the Protection of New Varieties of Plants is known to consider open and un-restricted access to the genetic resources of protected plant varieties to be important to the continued development of new varieties. This opinion is indicated in the "breeders' exemption" clause of the Convention, as described above, and was reinforced in October 2005 in a reply to a notification from the Convention on Biological Diversity. In April 2003, the Convention on Biological Diversity asked the UPOV for comment on the use of Genetic Use Restriction Technologies (also known pejoratively as 'terminator genes') as they relate to the promotion of intellectual property rights. In the summary of