I have said this before and I say it again: the best policy to follow is to simply assume that the proctor will strictly follow the rules
clearly listed at MBA.com, then you will not be negatively surprised or dissapointed.
Also, since it seems that the level of enforcement seems to vary from place to place, what is the use of asking on this forum unless you are sure to go to the same place with the same proctor who is in the same mood as for whoever gives you their wonderful advice?
Wearing a watch will not give you an edge so why worry about it? If I were you I would simply assume that I could ONLY bring ID and take all of my practice tests under that assumption. Period end.
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993