What institution(s) has the power to impose non-criminal sanctions for campaign finance infractions?
United Kingdom
Answer
Electoral Commission
Source
Political Parties and Elections Act 2009
http://www.legislation.gov.uk/ukpga/2009/12/contents
See also for criminal sanctions:
Representation of the People Act 1983
Art. 74-76
Comment
Electoral Commission is relatively new body in UK, the usual task of administering elections is carried out still mainly by local returning officers, whose functions fall under the definition of EMB.