When entering a port a vessel must display —
| (a) | its national colours; |
| (b) | the flag of the Republic; |
| (c) | if applicable, a signal indicating that a pilot is on board (international code flag "H"); |
| (d) | if free pratique has not been granted, a quarantine flag (international code flag "Q"); |
| (e) | if immigration officials are required (international code flag "I"); |
| (f) | if there are dangerous goods on board, international code flag "B" by day and a red light by night; and |
| (g) | any other signal the Harbour Master requires. |
