(qv) rules relating to the conduct of insurance business. The FSMA empowers the FSA to make rules prohibiting an authorised person, who has permission to effect or carry out contracts of insurance, from carrying on a specified activity. Another rule empowers the FSA to make rules in relation to contracts entered into in the course of carrying on long-term insurance business particularly in regard to linked-policies (s.141(4)). It means that where the FSA has determined that a particular index is no longer permissible it can stop new policies being linked to that index. It can also require that existing linked policies should substitute a new index for the prohibited one.