Usually record retention is listed on OFI website in each state. Most states require signature cards for 7 years so that is usually what IRAs go with since it has a product with it. But again it varies in each state.
There is a general rule in BSA for five years. In the back of the FFIEC exam manual there is a list if more specific record retention rules that is helpful.
Same thing with escheatment…some states escheat and some dont.