No insurance company, nonprofit health service corporation, or health maintenance organization may deliver, issue, execute, or renew any health insurance policy, health service contract, or evidence of coverage on an individual, group, blanket, franchise, or association basis if the policy, contract, or evidence of coverage contains any exclusion, reduction, or other limitation as to coverage, deductibles, or coinsurance provisions, as to involuntary complications of pregnancy, unless the provisions apply generally to all benefits paid under the policy, contract, or evidence of coverage. If a fixed amount is specified in the policy, contract, or evidence of coverage for surgery, the fixed amounts for surgical procedures involving involuntary complications of pregnancy must be commensurate with other fixed amounts payable for procedures of comparable difficulty and severity. If a fixed amount is payable for maternity benefits, involuntary complications of pregnancy are an illness and entitled to benefits otherwise provided by the policy, contract, or evidence of coverage. If the policy, contract, or evidence of coverage contains a maternity deductible, the maternity deductible applies only to expenses resulting from normal delivery and caesarean section delivery; however, expenses for caesarean section delivery in excess of the deductible must be treated as expenses for any other illness under the policy, contract, or evidence of coverage. For purposes of this section, “involuntary complications of pregnancy” includes nonelective caesarean section delivery.