“The health insurance rate-review regulation included in last year’s health care overhaul goes into effect this week… So how will it be determined if insurers are engaged in a ‘pattern or practice’ of ‘excessive or unjustified’ increases? However the authorities want. As CRS notes, ‘the terms “pattern” and “practice” are not defined by law.’ If those recommendations are anything like previous state-based efforts to regulate health insurance, they’ll probably be inconsistent and inscrutable.”