I want to know the answer to the following question:
In what year was Octavian first allowed to use the names Augustus and Princeps?
All the background I'm provided with is that "Octavian was granted a series of special powers including sole "imperium" within the city of Rome, permanent consular powers and credit for every Roman military victory, since all future generals were assumed to be acting under his command.". Is that enough to answer the question?