46 C.F.R. § 308.531 Endorsement of surety bond increasing or decreasing amount of coverage, Form MA–311.
Title 46 - Shipping
The Standard Form of Endorsement which shall be used in increasing or decreasing the amount of a surety bond, Form MA–311, may be obtained from the American War Risk Agency or MARAD.
Title 46: Shipping
PART 308—WAR RISK INSURANCE
Subpart F—War Risk Cargo Insurance
II—Open Policy War Risk Cargo Insurance
§ 308.531 Endorsement of surety bond increasing or decreasing amount of coverage, Form MA–311.

