RULE 47. HANDLING CABOOSES.     (a) Cabooses will be placed upon caboose track within 1 hour and 30 minutes after arrival at terminal and will be left on such track until after reporting time for the following trip.  

     (b) Caboose track shall be kept free from all cars other than those containing ice and coal for servicing cabooses.  

     Note: See Appendix "A" - Item 47.