How to create a normalization rule which will replace the 336 337 and 338 with French fields if the 040 subfield b is “fre” and occur when the record is saved

In the example here we will, as the title suggests, make a normalization rule which will do the following if the 040 subfield b is “fre”: Remove the current 336, 337 and 338 fields Add new 336, 337 and 338 fields in French Occur when the record is saved Disclaimer: Note that our example here is for...