PART 364—USE OF PENALTY MAIL TO ASSIST IN THE LOCATION AND RECOVERY OF MISSING CHILDREN Authority: 39 U.S.C. 3220(a)(2). Source: 52 FR 527, Jan. 7, 1987, unless otherwise noted. § 364.1 Purpose. These regulations, which implement 39 U.S.C. 3220, provide the standards and guidelines for the use of Board penalty mail in the location and recovery of missing children. § 364.2 Definitions. For purposes of this part, terms are defined as follows: All-A-Board Field office Penalty mail Shelf life § 364.3 Publication of missing children information in the Railroad Retirement Board's in-house publications. (a) All-A-Board. (b) Other in-house publications. § 364.4 Placement of missing children posters in Board field offices. (a) Poster content. (b) Transmission of posters to field offices. (c) Field office use of posters. (2) The field office must remove and destroy the posters by the end of their shelf life. The field office also may remove posters that they believe have ceased to be of assistance in locating and recovering missing children. § 364.5 Further study of the use of penalty mail in the location and recovery of missing children. (a) Criteria. (1) Be cost effective; and (2) Fulfill the goal of aiding in the location and recovery of missing children. (b) Requirements.