Is chlorine the central atom in NOCl? We've been told that the in the structure of $\ce{NOCl}$ the central atom is $\ce{Cl}$ (rather than $\ce{N}$) due to some exception. 

Looking up on internet I could not find anything to support this. I would like to know if it really exists in such a state due to some exception. If yes, what is that exception.
Wikipedia gives a structure with a central nitrogen atom:



The nitrogen atom (blue, using the standard color scheme) can form all three covalent bonds without building up an excess positive or negative charge, and so is favored in the central position through which all three bonds pass.