Wow, this topic’s resurrection leading to Vern’s last post has really helped answer the OP!  Thank you all, but especially @Krimzand @Vern Edwards. I fear many COs use the third option, acquiescence, instead of the fifth, forbearance.  Beginners and others alike should resolve to change that (see Krimz’s posts to learn how to forbear).  My OP asked for the difference between the fourth option, new contract (or change order to be followed by supplemental agreement), and the fifth option.  I’