Section 27: Submission of Bids.

(1) All bids in response to an invitation to open competitive bidding shall be submitted in writing and in addition to any other format stipulated in the tender documents, signed by an official authorized to bind the bidder to a contract and placed in a sealed envelop.
(2) All submitted bids shall be deposited in a secured tamper-proof bid-box.
(3) All bids submitted shall be in English language.
(4) The procuring entity shall issue a receipt showing the date and time the bid was delivered.
(5) Any bid received after the deadline for the submission of bids shall not be opened and must be returned to the supplier or contractor which submitted it.
(6) No communication shall take place between procuring entities and any supplier or contractor after the publication of a bid solicitation other than as provided in this Act.