Silver Spring’s new Fillmore music hall will be getting an $800,000 tax break over ten years under a law proposed by Montgomery County Executive Ike Leggett. The proposed measure applies to the county’s arts districts in Wheaton, Silver Spring, and Bethesda, and a county memo says the only projects eligible for the tax break would be the Fillmore and any condos units in a Bethesda building, the Trillium, that are occupied by “certified” artists or arts groups. The music hall, to be run by Live Nation, is expected to open in late 2009 or 2010. The agreement between the county and Live Nation has been criticized for being a sweetheart deal.