:: This leaves me in a quandry. I can cite and verify that there is no law to bar someone holding both offices, but the only cite I have there is precident not to is that it hasnt happened. If I only include in the article the part I can verify and cite, that there is no law to bar holding dual offices, then the article is misleading. If I include that there is precident to not do so, then the article is uncited. If I fail to include it at all, then we miss out inclusion of a notable fact. This is not trivia. Most other bicameral institutions do have an explicit bar, and Congresses lack of one is notable and of interest. 

 :: Can you please suggest a way to re-phrase this addition, or help me in looking for cites to support the precident? 

 ::(Incidently, the 'seperation of powers' between the three branches of government is explicit in the constitution. It does not use the term, but it does use language to describe a seperation of powers. ie, "All legislative Powers herein granted shall be vested in a Congress of the United States" means that the Congress is the lone and sole originator of legislative power.)