51.—(1) If at any time after arraignment the prosecuting authority intends to—
(a)amend, or substitute another charge or charges for, a charge;
(b)discontinue proceedings on a charge;
(c)prefer an additional charge;
he shall seek the leave of the judge advocate.
(2) Where the judge advocate gives leave to discontinue proceedings on a charge, he shall consider whether to give the direction provided for in section 83B(14) of the Act.