(a) The terms of these clauses follow those appearing in Standards Australia contract AS2124-1992 other than the inserted cll. 5.2A and 5.7. The insertion of the latter clause in the present building contract has the consequence that the succeeding clauses have a numbering which differs from their equivalents in AS2124-1992.
(b) The purpose of the provision of security is to ensure the due and proper performance by the Contractor of the building contract.
(c) Section 5 contemplates a number of different kinds of security:
(i) Retention money deducted from progress payments. This is treated differently from other forms of security and may not be properly called security in the terms used in the building contract. Item 15 of the annexure shows that the intention of the parties was that no security be provided in the form of retention money.
(ii) Security, properly so called in terms of the building contract, may take any of a number of forms -
* cash
* bonds or inscribed stock
* interest bearing deposit in an Australian bank
* an approved unconditional undertaking given by an approved financial institution
Two things should be noted about this security. First, that cash may be provided, not as retention money, but as security, properly so called. Second, bank bonds are just one of the forms of security contemplated by cl. 5.3. Any consideration of the construction of section 5 and the role it plays in the building contract must have regard to the possibility that other forms of security may be provided.
(d) Notwithstanding its misleading heading, cl. 5.6, with which this case is concerned, deals with two matters: the conversion of non-cash security into money and recourse to retention money, security or both. These steps may be taken only where three preconditions have been satisfied. In this sense, the right of the Principal to convert the non-cash security into money and to have recourse to it is not unfettered. The second and third preconditions have clearly been satisfied in this case. The first precondition is that the Principal "has become entitled to exercise a right under the Contract in respect of the security, retention moneys or both". It is only an entitlement to exercise this particular right under the building contract that triggers the right of access to the security, in this case to call upon the bank bonds.