Carbon permits for the Northeast's carbon market traded as high as $5.10 a ton on Monday, an all time high, following the release of federal rules that will allow states to use markets to meet new emissions targets. The market's benchmark December 2014 contract traded for $5.10 a ton on the IntercontinentalExchange on Monday before retreating to $5 a ton later in the day, brokers said. The market's spot contract for June delivery also traded for $5 a ton. On Monday, the Obama administration released regulations calling for the power sector to cut carbon emissions 30 percent by 2030 from 2005 levels. Under the rules, states can use cap-and-trade programs such as the nine-state Regional Greenhouse Gas Initiative (RGGI) to achieve the goals.