The influence that an approved person has over any of the controlled functions (1 to 20 in the FSA’s table of controlled functions). Persons with significant influence must: (a) take reasonable steps to ensure that the firm’s regulated business is so organised that it can be controlled effectively; (b) exercise due skill, care and diligence in managing that business; and (c) take reasonable steps to ensure that the business complies with relevant regulatory requirements. (Visit www.fsa.gov.uk).