Area communities are applauding new legislation giving them more flexibility in using funds from the Community Preservation Act, even though the changes also limit their use of money for artificial turf projects. The recently approved state budget includes an overhaul of the 12-year-old law that allows cities and towns to impose a property tax surcharge of up to 3 percent, matched by state funds, to support affordable housing, open space, historic preservation, and recreation projects. Local officials welcome changes they say will greatly expand their ability to use CPA funds for recreation projects, as well as providing an easier way to adopting the law. Separately, $25 million in state funds was added to the program for this year. But the revisions also included a new restriction: a ban on using CPA funds to acquire artificial turf for athletic fields.