I wonder is it possible to catch the value which is going to be written into CEL, modify it and then write into CEL?

I know that I can write my own info into CEL by ObjectModel. But I want to get rid of automatically generated info about RGMRecipe changes and do it on my own.
I think that it is possible to turn off automatic CEL info generating. It is my plan B to do it this way, but changing automatic CEL values would be better for my project.