Retirement tax questions

Regarding Line 4 on the W-9, it is not 100% clear if the last sentence in that box ("Applies to accounts maintained outside the U.S.") is referring ONLY to the line above it ("Exemption from FATCA reporting code (if any)"), or, if that refers to BOTH items above it in that box for line 4 Exemptions.  ("Exempt payee code (if any)" and "Exemption from FATCA reporting code (if any)")  

One reason I began to question that is in one example of a self directed IRA custodian instructing how to fill out a W-9 they said leave line 4 blank, but another IRA custodian's example said to enter 1 for the exempt payee code.  (This is for a domestic account.)

I guess it couldn't hurt to enter 1 for Exempt payee code and also enter A for Exemption from FATCA reporting code, as a Youtube presentation by a tax attorney explained. (even though this is domestic, not maintained outside the US)