be authorized by law. (c) Postal services The Commission may use the United States mails in the same manner and under the same conditions as departments and agencies of the United States. 406. Staff of the Commission (a) Detailees Any Federal Government employee may be detailed to the Commission without reimbursement from the Commission, and such detailee shall retain the rights, status, and privileges of his or her regular employment without interruption. (b) Consultant services The Commission is authorized to procure the services of experts and consultants in accordance with section 3109 of title 5, United States Code, but at rates for individuals not to exceed the daily equivalent of the annual rate of basic pay in effect for a position at level IV of the Executive Schedule under section 5315 of title 5, United States Code.