Recently, I became aware by own experiences and friend's stories that some international statistical journals (whose names I prefer to omit) are rejecting papers because they do not include a reference of the journal in question. This is, if you do not cite a paper from journal X, then you cannot attempt to publish a paper in journal X.
This, of course, has an influence on the Impact Factor of the journal and the administrators are trying to increase this.
Are there explicit regulations regarding these issues? Is it possible to denounce this kind of behaviour?
Not quite the same thing, but I was once requested by the EIC of a journal to add some references to papers published in the journal in question to a paper that I had submitted, explicitly to promote the journal by improving its impact factor. I did not comply with this request; the papers that were relevant were already in the reference list. Sadly this sort of thing is becoming increasingly common (as is manipulation of review times etc.), although rejecting a paper on such grounds would be taking things to another level!