The Swiss government has taken steps to curb the usage of hidden services by foreign account holders as they have been frequently used to facilitate the transfer of "black money".[213] In May 2013, Switzerland announced that it would amend certain banking secrecy laws applicable to UBS Switzerland AG to allow the disclosure of hidden client accounts to various investigative authorities.[213] However, the disclosure of such information is heavily regulated and only "occur exclusively within the scope of administrative assistance procedures based on a valid double taxation agreement."[2]