Code of Federal Regulations Title 46. Shipping § 46.129.570 Overfill protection

(1) Be independent of each other;

(2) Alarm in the event of loss of power to the alarm system or failure of electrical circuitry to the tank level sensor;  and

(3) Be able to be checked at the tank for proper operation prior to each transfer or contain an electronic self-testing feature that monitors the condition of the alarm circuitry and sensor.

(1) Alarm before the tank overfill alarm, but before the tank capacity goes below 95 percent;

(2) Be appropriately marked at the indicator panel;  and

(3) Have audible and visible alarm indications that can be seen and heard on the vessel where oil transfer is controlled.

(1) Be independent of the oil gauging system;

(2) Alarm early enough to allow the person in charge of transfer operations to stop the transfer operation before the oil tank overflows;

(3) Be appropriately marked at the indicator panel;  and

(4) Have audible and visible alarm indications that can be seen and heard on the vessel where oil transfer is controlled and in the cargo deck area.