The U.S. Coast Guard has announced the availability of a policy letter establishing alternative pressure relief valve settings for certain cargo tanks transporting liquefied gases in U.S. waters. 77 Fed. Reg. 59,408 (9/27/12). The letter clarifies that allowable stress factors included in the International Maritime Organization’s (IMO’s) Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) can be used for type B and type C independent cargo tanks. Tanks not built according to the IGC Code and not authorized to participate in the Coast Guard’s “Alternative Compliance Program” must comply with current Coast Guard regulations, which require selfpropelled ships carrying liquefied bulk gases in type B and C tanks to use more stringent stress factors than those in the IGC Code.