The House Intelligence, Emerging Threats and Capabilities subcommittee proposed the Pentagon select the executive agent after the Defense Department's Test and Evaluation Strategic Plan "identified a number of capability gaps that need to be addressed in order to provide sufficient and adequate cyber test and training.
The subcommittee in its mark on the 2015 defense budget didn't specify if the agent should be a service or an agency like the Defense Intelligence Agency. If the addition to the defense budget legislation is passed by Congress and a service is selected, it would possibly signal which service would be taking the lead on the cyber mission.
Thus far the service leaders have avoided trying to take the role as the military leader for cyber saying the Pentagon is still trying to figure out how it fits into national security.
The agency or service that is selected stands to take over additional cyber missions and the likely funding boost that comes with it.