This ad hoc arbitration, conducted under the 1976 UNCITRAL Rules, arose from a 1997 fixed-price contract for USD 315 million between Huntington Ingalls Incorporated, a U.S. shipbuilder, and the Ministry of Defense of the Bolivarian Republic of Venezuela. The dispute concerned the refurbishment of two LUPO-class frigates. The arbitral tribunal, seated in Rio de Janeiro, Brazil, was composed of President José Emilio Nunes Pinto, appointed by the ICC Court, Horacio A. Grigera Naón (Claimant's appointee), and Antonio Hierro (Respondent's appointee). The central legal issue revolved around the interpretation of the contract's provisions for extra work. The contract contained both Clause 8, which established a pre-funded reserve of approximately USD 43 million for 'extras and/or contingencies,' and Clause 59, which provided a mechanism for 'absolutely necessary' work that was not included in the original price and required separate agreement and funding. The Tribunal undertook a detailed analysis, concluding that the two clauses were designed to operate in parallel. It determined that Clause 59 was an exceptional mechanism for work essential to fulfilling the contract's fundamental purpose, and its use was not contingent upon the prior exhaustion of the Clause 8 funds. Claimant brought over one hundred 'constructive claims,' categorized as Requests for Equitable Adjustment (REAs), for a wide range of out-of-scope work. It also sought substantial damages for project delays and disruption, as well as the outstanding balance of the contract price. The Tribunal meticulously analyzed each REA, applying the high standard of proof required by Clause 59—that the work was 'absolutely necessary' for the contract's fulfillment. It awarded a significant number of these claims, totaling USD 41,112,674.50, for issues such as system interface problems, additional sea trials, a gas turbine system design defect, and failures of the air conditioning plant, finding the Ministry responsible for the required extra work. However, it dismissed numerous other claims where the Claimant failed to meet the high evidentiary burden or where the work was deemed to fall under other contractual provisions. Regarding the claim for delay damages, Claimant's expert identified a total project delay of 1,095 days. The Tribunal accepted a delay period of 1,005 days but found that both parties had contributed to it. Unable to precisely allocate fault, the Tribunal applied a 50/50 parity principle based on Venezuelan law. Consequently, it awarded Claimant 50% of the calculated direct delay costs, amounting to USD 16,755,862.50, while dismissing claims for indirect and consequential damages like unabsorbed overhead. The Tribunal also awarded Claimant's claim for the outstanding contract balance of USD 3,951,341, finding the Respondent's objections had been successfully rebutted. The Ministry had filed a counterclaim for approximately USD 75.9 million, primarily based on a contractual penalty clause for delays. The Tribunal admitted the counterclaim but reasoned that since both parties were responsible for the delay, the penalty clause, which was designed for situations where only the Claimant was at fault, could not be applied as written. Applying principles of Venezuelan law and equity, the Tribunal reduced the penalty owed by Claimant by 50% to reflect the Ministry's shared responsibility, ordering Claimant to pay the Ministry USD 13,900,000. All other aspects of the counterclaim were dismissed for lack of evidence. Ultimately, the Tribunal ordered the Ministry to pay Claimant a total of USD 61,819,878 in damages and outstanding payments, plus interest at 8.713% per annum from April 5, 2002. The parties were ordered to bear their own legal fees and to split the arbitration costs evenly, which resulted in a further net payment for costs owed by the Ministry to the Claimant. Arbitrator Horacio A. Grigera Naón issued a partial dissent, disagreeing with the majority's reasoning on the delay and overhead claims and aspects of the counterclaim.