This subchapter is adopted under the general authority of RCW 48.02.060, 48.44.017, 48.44.020, 48.44.050, 48.46.060, 48.46.062, 48.46.200, and 48.43.733. Its purpose is to provide guidelines for the implementation of RCW 48.44.017(2), 48.44.020(3), 48.44.022, 48.44.023, 48.44.040, 48.46.060 (4) and (6), 48.46.062(2), 48.46.064, 48.46.066, 48.18.110, 48.18.480, and 48.43.733 as to the filing of grandfathered individual and small group health plans applicable under RCW 48.44.017, 48.44.022, and 48.44.023 by health care service contractors, grandfathered individual and small group health plans applicable under RCW 48.46.062, 48.46.064, and 48.46.066 by health maintenance organizations, stand-alone dental plans and stand-alone vision plans offered by health care service contractors, health maintenance organizations, and disability carriers to individuals and small groups, and the calculations and evaluations of premium rates for these contracts.