ARMY TM 9-6115-644-24P AIR FORCE TO 35C2-3-446-14 MARINE CORPS TM 09249A/09246A-24P/3 3. Explanation of Columns (Sections II and III)  .  -  (Continued) Code Explanation PA PB Stocked items;   use the applicable NSN to request/ PC** requisition items with these source codes. They are PD authorized to the category indicated by the code PE entered in the 3rd position of the SMR code. PF PG **NOTE: Items  coded  PC  are  subject  to  deterioration. Code KD KF KB Explanation Items with these codes are not to be requested/ requisitioned   individually. They are part of a kit which is authorized to the maintenance category indicated in the 3rd position of the SMR code. The complete   kit must be-requisitioned and applied. Code Explanation MO- (Made at org/ AVUM Level) MF- (Made at DS/ AVIM Level) MH- (Made at GS Level) > ML- (Made at Spe- cialized Repair Activity  (SRA) code, MD- (Made at Depot) Items with these codes are not to be requested/requisitionedindividually.   They must be made from bulk material which is identified by the part number in the DESCRIPTION AND USABLE ON CODE (UOC) column and listed in the Bulk Material group of the repair parts list in this RPSTL. If the item is authorized to you by the 3rd position code of the SMR but the source code indicates it is made at a higher level,    order the item from the higher level of maintenance. AO- (Assembled by org/AVUM  Level) AF- (Assembled by DS/AVIM  Level) AH- (Assembled by GS  Category) AL- (Assembled by > SRA) AD- (Assembled by Depot) Items with these codes are not to be requested/requisitioned  individually.  The parts that make up the assembled item must be requisitioned or fabricated and assembled at the level of maintenance indicated by the source code. If the 3rd position code of the SMR code authorizes you to replace the item, but the source code indicates the item is assembled at a higher level,    order the item from the higher level of maintenance. 3