The Federal Communications Commission moved Wednesday to enact changes to the rural health care component of the Universal Service program after a test that the agency termed successful. The FCC also proposed rules that would require carriers to allow subscribers to send text messages to 911 emergency centers by 2014 in an effort to codify steps voluntarily taken by the four major carriers. In addition, the agency moved ahead on plans to free up wireless spectrum by allowing commercial services to share a slice of 3.5 GHz frequencies held by the military in a step designed to give a boost to small cell technology.