TM  5-2815-240-34&P B-2        Change 3 b. SMR Code [Column (2)]. The SMR code is a 5-position code containing supply/requisitioning information, maintenance category authorization criteria, and disposition instruction, as shown in the following breakout: Source Maintenance Recoverability Code Code Code xx   xx        x 1st two 3rd position: 4th position: 5th position: positions: Who can install, Who can do Who  determines How to get an replace, or use complete  repair* disposition action item. the item. on the item. on unserviceable  items. * complete repair:  Maintenance capacity, capability, and authority to perform all corrective maintenance tasks of the “repair”  function in a use/user environment in order to restore serviceability to a failed item. c. Source Code.  The source code tells you how you get an item needed for maintenance, repair, or overhaul of an end item/equipment.  Explanations of source codes follow: Source Code Application/Explanation PA PB PC PD PE PF PG KD KF KB MO-Made at unit level MF-Made at DS level MH-Made at GS level ML-Made at SRA MD-Made at depot Stock items; use the applicable NSN to requisition/ request items with these source codes.  They are authorized to the level indicated by the code entered in the 3rd position of the SMR code. NOTE Items coded PC are subject to deterioration. Items with these codes are not to be requested/ requisitioned individually.  They are part of a kit which is authorized to the maintenance level indicated in the 3rd position of the SMR code.  The complete kit must be requisitioned and applied. Items with these codes are not to be requisitioned/ requested individually.  They must be made from bulk material which is identified by the P/N in the DESCRIPTION AND UOC column and listed in the bulk material group work package of the RPSTL.  If the item is authorized to you by the 3rd position code of the SMR code, but the source code indicates it is made at higher level, order the item from the higher level of maintenance. B-3. EXPLANATION OF COLUMNS IN THE REPAIR PARTS LIST AND SPECIAL TOOLS LIST WORK PACKAGE (Continued).