In 18 BC, Agrippa's powers were even further increased to almost match those of Augustus. That year his proconsular imperium was augmented to cover the provinces of the Senate. More than that, he was finally granted tribunicia potestas, or powers of a tribune of the plebeians. As was the case with Augustus, Agrippa's grant of tribunician powers was conferred without his having to actually hold that office. These powers were considerable, giving him veto power over the acts of the Senate or other magistracies, including those of other tribunes, and the power to present laws for approval by the People. Just as important, a tribune's person was sacred, meaning that any person who harmfully touched them or impeded their actions, including political acts, could lawfully be killed. After the grant of these powers Agrippa was, on paper, almost as powerful as Augustus was. However, there was no doubt that Augustus was the man in charge.