33 CFR 97.205: Requirements for amending an approved cargo securing manual (CSM).

Resubmission and re-approval by a CSM approval authority are required after any of the following events occurs:

(a) Reconfiguration of a vessel from one type of cargo carriage to another (e.g., a general break-bulk cargo vessel reconfigured to a container or a roll-on/roll-off vessel).

(b) Reconfiguration or replacement of 15 percent or more of the vessel's fixed cargo securing or tie-down systems with different types of devices or systems.

(c) Replacement of 15 percent or more of the vessel's portable cargo securing devices, with different types of devices for securing the cargo not already used aboard the vessel (e.g., wire lashings replaced with turnbuckles or chains).