The following references are provided as an abridged, quick reference guide for policies on the Modular Open System Approach (MOSA) as applicable to Space Systems.


  • 2021 NDAA (became law on 1/1/2021):  Section 804
    • added requirements for the implementation of MOSA to fully realize the intent of chapter 144B of title 10, U.S. Code.
      • chapter 144B of title 10, U.S. Code is equal to (=) 2017 NDAA Section 805; 2446a, 2446b, 2446c

DoD Policy

  • DoDI 5000.88 (dated 18 November 2020): Section 3.7a
    • Requires the LSE, under the direction of the PM, to use a modular, open systems approach in product designs to the maximum extent practicable in accordance with Sections 2446a, 2446b, and 2446c of Title 10, U.S.C (i.e. 2017 NDAA, Section 805)

Air Force Policy