(1) A person must not attach a marker buoy to a fish cauf unless the marker buoy is (a) spherical in shape; and(b) at least 195 millimetres in diameter; and(c) specifically designed as a buoy; and(d) marked clearly and legibly with the distinguishing mark of the fishing vessel from which the fish cauf is being used.Penalty: Grade 1 penalty.(2) A distinguishing mark for the purposes of subrule (1)(d) is to be at least 70 millimetres high and at least 12 millimetres wide.