question on compulsory isi

[falen]

OK I have a question.  The isi book says that there should be limited connecting steps between elements.  So does that mean no strokes or crossovers between or before?  How is that possible with say a jump or a spiral?  And it permitted, when is it excessive?

Thanks

Boy do I wish i did not always have to ask on this board, but I am such a know nothing that the only posts are asking not giving advice!  I am sorry