Construction risks the construction of any major power plant involves many risks, including shortages of materials and labour; work stoppages and other labour disputes; weather interference; disputes with landowners; catastrophic events such as floods, volcanic eruptions, earthquakes or fires; sab otage, including guerrilla attacks; and engineering, archaeological, environmental and geo logical problems. Any of these could cause delays and/or cost overruns. Mitigating these risks on this particular project were insurance against specific construction risks, the obligation of the EPCM contractors to pay liquidated damages resulting from unexcused delay in achieving provisional acceptance by the Guaranteed Completion Date and a US$35 million contingency in the construction budget Operating risks Although the plant was to use proven technology, and would be operated and maintained by companies with significant experience and high reputations, any major power plant is subject to many risks, including the breakdown or failure of equipment or processes, and plant performance below expected levels of output and efficiency. These problems may be caused by wear and tear, misuse, labour disputes, weather, catastrophic events or sabotage. Although the project company was to maintain insurance and reserves to protect against these risks, there could be no assurance that these measures would cover all possible financial losses. Currency risks Because it was to receive revenues in local currency and pay debt obligations in foreign cur rency, the project company would be subject to foreign exchange rate risk and availability risk. The foreign exchange rate risk was covered by the US dollar indexation of Meralco's peso-denominated payments under the PPA, but the project would still have foreign exchange availability risk because there was no assurance that the Onshore Trustee would be able to obtain dollars at a given time. The Monetary Board of the Central Bank has the power, with the approval of the President of the Republic, temporarily to suspend or restrict foreign exchange transactions during a national emergency or a foreign exchange crisis.