Michigan Attorney General Mike Cox has again called on state lawmakers to preserve regulatory oversight of Blue Cross Blue Shield of Michigan rates when they tackle health insurance legislation this session. Cox has criticized Blue Cross attempts to change rules covering the health insurance market for individuals. Legislation backed by Blue Cross died last year but likely will be reintroduced. Cox sent lawmakers a letter suggesting they tighten requirements on Blue Cross reporting of charitable spending and reserve levels, along with several other changes, in the upcoming legislation.