Short answer is: The NDAA for FY21, section 802 is part of H.R. 6395-346 therefore, a statute (law) and supersedes DoDI 5000.85 Major Capability Acquisition, dated 06 August 2020.  Longer answer: The Life Cycle Sustainment Plan (LCSP) is again the correct term and now is aligned with statute where before the Product Support Strategy was mentioned in NDAA for FY13 and language in the DoDI 5000.85 was an attempt to correct the misalignment.  To your point, “a rose by any other name would smell as sweet;” name notwithstanding however, LCSP is the proper name for the all-inclusive document.  The PSS is normally section 3 within the LCSP.  Excellent question!