Express contractual 80% ceiling governs supply-stage payments despite separately priced BoQ items.

The appellants were contractors who had entered into contracts with the Kerala Water Authority (“KWA”) for Jal Jeevan Mission projects involving design, construction, supply, laying, testing, commissioning and maintenance of water-supply infrastructure.

The contracts contained Bills of Quantities (“BoQ”) in which materials such as pipes were separately described and assigned quoted rates. After supplying and obtaining inspection/certification of substantial quantities of materials, the contractors claimed payment at the full quoted BoQ rates.

KWA, relying principally on Clauses 8.8 and 9.14.1.6 of the tender conditions, restricted payment at the supply stage to 80% of the estimate rate or quoted rate, whichever was lower.

The contractors challenged this restriction before the learned Single Judge, contending that the contracts were item-rate BoQ contracts and that payment became fully due once an independently priced supply item was delivered, measured and certified. The learned Single Judge rejected the claim. The connected writ appeals challenged that decision.

A contract must be construed as a whole, giving effect to all its provisions and ascertaining the objective intention of the parties from the contractual language, context, payment mechanism and commercial setting.

A BoQ contract is not automatically divisible merely because its components are separately priced; divisibility depends on the parties’ intention as reflected in the contractual terms and payment machinery.

Express contractual terms prevail over an implied term, and courts cannot rewrite a commercial contract or imply a term merely because it appears more reasonable or commercially beneficial.

The Court relied on Afcons Infrastructure Ltd. v. Nagpur Metro Rail Corporation Ltd., Silppi Constructions Contractors v. Union of India and Agmatel India Pvt. Ltd. v. Resoursys Telecom for the principle that the tendering authority’s interpretation of its own tender documents ordinarily deserves judicial deference unless it is arbitrary, irrational, mala fide or perverse.

The Court also applied the principles in Nabha Power Ltd. v. Punjab State Power Corporation Ltd. and Adani Power (Mundra) Ltd. v. Gujarat Electricity Regulatory Commission concerning business efficacy, while holding that such principles cannot override clear express terms.

Under the Kerala Public Works Account Code, a “secured advance” is an intermediate payment against materials brought to site and is distinct from final payment for completed work.

The Court accepted that the contracts contained separately priced BoQ items but held that the BoQ could not be read in isolation from the remaining tender conditions.

The overall contractual scheme described the work as a composite EPCM/lump-sum project involving supply, erection, laying, testing, commissioning and maintenance. The separate valuation of pipes facilitated measurement and billing but did not sever their supply from the larger project obligations.

Clauses 9.14.1.1 to 9.14.1.5 demonstrated that supply was not an isolated transaction: materials had to be supplied in phases, pursuant to written instructions, and with reference to the actual progress of laying works.

Clause 9.14.1.6 expressly regulated the amount billable “on each supply” and imposed a ceiling of 80% of the estimate rate or quoted rate, whichever was lower.

Clause 8.8 reinforced that interpretation by characterising the payment as a secured advance and linking it to the approved payment break-up.

The stage-wise payment provisions in Clauses 8.15 and 8.16 further showed that the contract contemplated progressive payments for work in progress, commissioning-pending work, testing and commissioning, maintenance and final completion.

Therefore, the contractual rate in the BoQ determined valuation but did not create an unconditional right to receive the entire amount immediately upon delivery of the materials.

The absence of a precise provision in Clauses 8.8 or 9.14.1.6 identifying the exact stage at which the balance would be released did not invalidate the 80% ceiling, since the wider payment framework provided for progressive and final settlement.

Clauses 8.8 and 9.14.1.6 validly governed payment at the supply stage and restricted the billable amount to 80% of the estimate rate or quoted rate, whichever was lower.

The Court found no infirmity in the learned Single Judge’s judgment and dismissed all the writ appeals.

The interim arrangement directing continued release of 80% payments was vacated.