90. (1) A complaint by a bidder against a procuring and disposing entity shall first be submitted in writing to the Accounting Officer within fifteen working days from the date the bidder first became aware of the circumstances giving rise to the complaint.
(2) On receiving a complaint, the Accounting Officer shall make a decision in writing within fifteen working days indicating the corrective measures to be taken if any, including the suspension of the proceedings where he or she deems it necessary and giving reasons for his or her decision.

(3) Where -

(a) the Accounting Officer does not make a decision within the period specified in sub-section (2); or

(b) the bidder is not satisfied with the decision of the Accounting Officer

the bidder may make a complaint to the Authority within ten working days from the date of communication of the decision by the Accounting Officer.

91. (1) Upon receipt of a complaint, the Authority shall promptly give notice of the complaint to the respective procuring and disposing entity, suspending any further action thereon by the procuring and disposing entity until the Authority has settled the matter.

(2) The Authority shall, unless it dismisses the complaint-

(a) prohibit a procuring and disposing entity from taking any further action; or

(b) annul in whole or in part an unlawful act or decision made by the procuring and disposing entity.

(3) Before taking any decision on a complaint, the Authority shall notify all interested bidders of the complaint and may take into account representations from the bidders and from the respective procuring and disposing entity.

(4) The Authority shall issue its decision within twenty-one working days after receiving the complaint, stating the reasons for its decision and remedies granted, if any.