864. TOP Cancellation
(a) The foreman must advise the RTC of the TOP number to be cancelled;
(b) the RTC must state the TOP number and limits of the TOP to be cancelled which must be acknowledged as correct by the foreman;
(c) the RTC will state the TOP number, “cancelled” and the initials of the RTC which must be repeated by the foreman; and
(d) the cancellation does not take effect until it has been correctly repeated and acknowledged by the foreman.