Insurers that deliver, issue for delivery, renew, amend or continue any group health insurance policy or certificate that includes prescription drug coverage and utilizes a formulary shall provide at least sixty (60) days' advance notice to each insured and to each participating provider under the policy utilizing a prescription drug within the formulary before the insurer may remove such prescription drug from the formulary or make any change to the structure of prescription drug benefits under such policy.
Conn. Agencies Regs. § 38a-513-8