Mr Cowen added that the two governments were "determined to press ahead with all aspects of the Agreement that are within their respective competence".

BBC: McGuinness warns of political vacuum

The Law Society of Scotland has noted that while the imposition of a minimum price of alcohol is a devolved matter within the legislative competence of the Scottish Parliament, compatibility with EU Duty Directives must be taken into account.

BBC: Health Committee

Either that, or they should stick within their circle of competence, like Warren Buffett, who avoids technology altogether.

FORBES: Investors: Know The Space Or Keep Quiet