Hello again. Sorry for the delay, but crap happens when you attend March Term at my college. Also still left to wonder if I have diabetes or high cholesterol. Nervous about either one, but more so about the diabetes part. Anyway, if you were referring to Acting Vice President, that IS an unofficial designation for a Senate President Pro Tempore who assumes the two main duties of the Vice President in the latter's absence. For that reference go to http://en.wikipedia.org/wiki/Acting_Vice_President  
Keep it real, okay? Hope things stay smooth with ya. Remind me to yell at my doctor in the morning.