in the plan or coverage may charge an enrollee only the contracted network fee for any dental cleaning, including any dental cleaning that exceeds the annual maximum under the enrollee’s plan or coverage. (2) Duration of limited scope vision and dental plans In the case of an agreement between such a doctor and such a plan or coverage that offers limited scope dental or vision benefits— (A) the agreement may be extended for a term longer than 2 years only with the prior acceptance of the doctor for each such term extension