There is a newly updated published outline for DoD LCSP use.  Here is the link:

LCSP Outline Version 3.0 13_October_2022 v1.pdf (dau.edu)

There is no specific timeline for individual sections of the LCSP concerning their updating.  Your service may have established expected timelines, but the DoD instruction states:

"Update the LCSP:

• At each milestone and the Full Rate Production (FRP) decision (DoDI 5000.91 para 7.1c)

• Prior to each change in the PSS (DoDI 5000.91 para 7.1c)

• Following approval or revalidation of the Product Support Business Case Analysis (PSBCA) and before Sustainment Reviews (SR) (DoDI 5000.91 para 4.3d)

• Every five years (DoDI 5000.91 para 7.1c)

• For major upgrades or modifications (Recommended)

For programs using other Adaptive Acquisition Framework (AAF) pathways, consult DoDI 5000.91 and the pathway DoDI for details