See Section 1.3.1 for working with occasional Nemeth in a general textbook. This is NEW. See also Section 3.4. Also NEW. And Section 11.1.2, which states that all computations are transcribed in Nemeth. There are new provisions about beginning and ending Nemeth code symbols and transitioning in and out of Nemeth code for partially technical books that have only some Nemeth in them.
Found all this in the Index under Nemeth code.
Let us know if this helps.
--Joanna