text: Based on these timelines , it is estimated that , in principle , the mercury controls needed to comply with a multipollutant strategy can be met provided that ( 1 ) an adequate supply of materials and labor is available and ( 2 ) the control technology implementation process begins at least 16 months prior to the date controls must be in place .
  
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  The mercury controls can only be manufactured during the specified timeline if certain conditions and costs are met .