Factual Background
12 Axis was engaged by CBS as a sub-contractor to undertake work at a building site located in Gungahlin in the Australian Capital Territory (Site).
13 In or about September 2019, Axis was scheduled to commence set-out works on the Site but the formal commencement date for the set-out works was delayed to mid November 2019 due to alleged defects in the structural designs for the Site.
14 In the period between 21 November 2019 and 20 November 2020, Axis submitted 13 progress claims to CBS. CBS provided 13 payment schedules to Axis in response to the progress claims.
15 On 19 December 2019, CBS and Axis entered into an AS4303-1995 subcontract for the construction of internal partitions and the installation of external cladding at the Site (Subcontract).
16 Item 5 of Part A of the Subcontract provided that the "Date of Practical Completion" was 1 July 2020. Item 5 also provided that the rate of liquidated damages was $5,000.00 per day. By cl 35.6 of the Subcontract, CBS was entitled to liquidated damages at that rate if Axis failed to achieve practical completion by the Date of Practical Completion.
17 Axis did not reach practical completion by 1 July 2020. Axis did not ask CBS for a certificate of practical completion and no certificate of practical completion was issued to Axis.
18 On 3 November 2020, CBS sought liquidated damages of $550,000.00 for the period 2 July 2020 to 20 October 2020 in Payment Schedule 12 issued in response to Progress Claim 12.
19 On 4 January 2021, Axis submitted Progress Claim 14 in an amount of $1,192,580.83 (excluding GST), which included amounts previously unpaid for Progress Claims 11 to 13.
20 On 13 January 2021, CBS requested that Axis provide it with the keys for the apartment units constructed on the Site in order to achieve practical completion but Axis declined to provide the keys because of unpaid progress claims.
21 On 15 January 2021, CBS provided Axis with a payment schedule in response to Progress Claim 14. The payment schedule included 27 separate deductions, described as backcharges and numbered BC1 to BC26 (noting BC12 was split into two backcharge claims), for works performed by third party subcontractors, which in aggregate amounted to a sum of $264,287.75 (Payment Schedule).
22 On 20 January 2021, Axis served a show cause notice on CBS pursuant to cl 44 of the Subcontract alleging a number of breaches by CBS, including claiming back charges, making claims for unliquidated damages for which it had no entitlement and deducting liquidated damages and claiming delays when CBS's programmes were deficient and there was no critical path provided under the Subcontract (Show Cause Notice).
23 On 25 January 2021, CBS responded to the Show Cause Notice.
24 On 1 February 2021, Axis lodged an adjudication application under the SOPA.
25 On 16 February 2021, CBS lodged an adjudication response under the SOPA.
26 On 8 March 2021, the Adjudicator made the Determination under the SOPA in an amount of $783,474.63 (Adjudicated Amount). In summary, the Adjudicator relevantly concluded that:
(a) the value of the contracted works completed to the date of the Determination was $5,425,295.51;
(b) the aggregate amount of undisputed variations sought by Axis was $307,363.05 (Undisputed Variations);
(c) all disputed variations sought were rejected, other than Variation 5 in an amount of $6,003.00 (Allowed Variation);
(d) Axis had agreed to the deduction of an amount of $137,877.00, described as "Negative Variations", in respect of work that was within the original scope of the works but had subsequently been removed (Negative Variations);
(e) he was precluded by reason of s 22(4) of the SOPA from considering BC2, BC5, BC6, BC8 and BC19, in an aggregate amount of $42,122.22, for work undertaken by other contractors because of alleged bad workmanship and/or incomplete work (Excluded Backcharges) because they were advanced pursuant to the indemnity provisions in cl 17.1 of the Subcontract, which was different to the basis on which they had been advanced in the Payment Schedule;
(f) CBS was entitled to the amounts sought in BC1, BC3, BC4, BC7, BC10 and BC11, in an aggregate amount of $51,633.00, for work that Axis had agreed was to be undertaken by other contractors (Allowed Backcharges);
(g) CBS was not entitled to the amounts sought in BC12(No 1), BC12(No 2), BC13, BC15, BC16, BC17, BC18, BC21, BC22, BC23, BC24, BC25 and BC26, in an aggregate amount of $116,605.28, for works taken out of the hands of Axis due to alleged delays in carrying out the works (Rejected Backcharges);
(h) CBS was not entitled to charge Axis liquidated damages of $550,000.00 (Original Liquidated Damages Claim) as the expert evidence of Mr Diab was that the deficiencies in the construction programmes that CBS had provided to Axis were of such a serious nature that it was not able to identify a critical path and therefore it would follow that Axis would not be able to identify a critical path; hence, it would have been equally impossible for Axis to have submitted any claims to obtain an extension of time and equally, even if submitted, it would have also have been impossible for the Superintendent or CBS to have assessed such a claim in accordance with cl 35.6 of the Subcontract; and
(i) a further reason for rejecting the Original Liquidated Damages Claim was that, as Mr Diab had explained, the "poor quality" of the CBS construction programmes would not have permitted Axis to "effectively plan and execute the construction, coordination, resourcing and management of its work from a time, risk and financial perspective" and so plan its activities to achieve practical completion by 1 July 2020, the date specified for practical completion in the Subcontract.
27 The basis on which the Adjudicator arrived at the Adjudicated Amount was as follows:
Subcontract Works completed to date $5,425,295.51
Plus Undisputed Variations and Allowed Variations $313,366.05
$5,738,661.56
Less Negative Variations $137,877.00
$5,600,784.56
Less Allowed Backcharges $51,633.00
$5,549,151.56
Original Liquidated Damages Claim $nil
$5,549,151.56
Less Retention capped at 5% of Subcontract sum $276,914.82
$5,272,236.74
Less Amount paid to date $4,559,987.07
Adjudicated Amount (ex GST) $712,249.67
Plus GST $71,224.96
Adjudicated Amount (incl. GST) $783,474.63