Hazardous Materials: Authorization for the Continued Manufacture of Certain MC 331 Cargo Tanks

SUMMARY: This final rule extends from March 1, 1999 to July 1, 1999, the period for continued manufacture of MC 331 cargo tanks without certification and demonstrated performance of the emergency discharge control system. This amendment is necessary to provide for the uninterrupted production of specification MC 331 cargo tanks used in the transportation of propane, anhydrous ammonia and other liquefied compressed gases.

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