A public procurement procedure shall only be initiated where —
(a) the availability of funding for the public procurement requirement has been confirmed; and
(b) approval to proceed has been given by —
(i) in the case of a public procurement of a minor value, the accounting officer,
(ii) in the case of a public procurement of an intermediate value, the Public Procurement Committee, or
(iii) in the case of a public procurement of a major value, the Board.