(a) communicating to third parties

(a) communicating to third parties the amount or approximate amount of the proposed tender; except where the disclosure, in confidence, of the approximate amount of the tender was necessary to obtain insurance premium quotations required for the preparation of the tender; (b) entering into any agreement or arrangement with any other person that he shall refrain from tendering or as to the amount of any tender to be submitted; and (c) receiving or offering or paying or giving or agreeing to receive, offer, pay or give any sum of money or valuable consideration directly or indirectly to any person for doing or having done or causing or having caused to be done in relation to any other tender or proposed tender for the said Works any act or thing of the kind described above.