This Annex and arrangements described within it come into effect when the last of the parties to signify their acceptance of those arrangements through an exchange of letters signifies acceptance.
Daw'r Atodiad hwn a'r trefniadau a ddisgrifir ynddo i rym pan fo'r parti olaf yn dangos ei fod yn derbyn y trefniadau hynny drwy gyfnewid llythyrau.