http://www.washingtoncitypaper.com/blogs/youngandhungry/2012/10/01/food-trucks-begin-charging-sales-tax-today/
http://taxfoundation.org/blog/dc-expands-sales-tax-include-food-trucks?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%253A+TaxPolicyBlog+%2528Tax+Foundation+-+Tax+Foundation%2527s+%2522Tax+Policy+Blog%2522%2529