Upon receipt of a completed agreement and undertaking and satisfactory proof that adequate security has been provided, OWCP will notify an applicant for authorization to self-insure in writing that it is authorized to self-insure to meet the obligations imposed upon such operator by section 415 and part C of title IV of the Act. OWCP will also notify the applicant of the date on which its authorization is effective, the date on which such authorization will expire, and the date by which the applicant must apply to renew such authorization if the applicant intends to continue self-insuring its liabilities under the Act.