A plan for such buildout improvements began in 2007 in the wake of acquisition of the Seattle SuperSonics by an Oklahoma-City based ownership group in October 2006. Originally, city officials had hoped to include Oklahoma City Arena buildout improvements as part of a planned 2009 "MAPS 3" initiative. However, given the impending relocation decision of the Sonics ownership group in late 2007, the City Council of Oklahoma City placed a sales tax initiative on the city election ballot on March 4, 2008. This initiative was passed by a 62% to 38% margin, and extended a prior one-cent sales tax for a period of 15 months in order to fund $121 million in budgeted improvements to the arena, as well as fund a separate practice facility for a relocated franchise.