33 CFR §156.118

1. (a)The COTP may require a facility operator to notify the COTP of the time and place of each transfer operation at least 4 hours before it begins for facilities that:
   1. (1)Are mobile;
   2. (2)Are in a remote location;
   3. (3)Have a prior history of oil or hazardous material spills; or
   4. (4)Conduct infrequent transfer operations.
2. (b)In the case of a vessel to vessel transfer, the COTP may require a vessel operator of a lightering or fueling vessel to notify the COTP of the time and place of each transfer operation, as specified by the COTP, at least 4 hours before it begins.
3. (c)No person may conduct such transfer operations until advance notice has been given as specified by the COTP.