Date Changes Jan 15-21, 2017 DSCA Policy Memo 17-02 Establish and Revise Nonrecurring Cost (NC) Charges -AIM 9X Block II Sidewinder Missiles and Guidance Units has been posted. This memo updates Appendix 1 - USML IV – Launch Vehicles, Guided Missiles, Ballistic Missiles, Rockets Torpedoes, Bombs And Mines.. The memo partially supersedes DSCA Policy 10-36.