TPS544C20: If not use PEC

Part Number:TPS544C20

Hi,

If I do not use PEC with PMBus control of TPS544C20 / TPS544B20, I understand that register have not to set on PMBus about PEC, is it correct?
If the host side does not assume PEC,I believe that it operates regardless of PEC registers, is it correct?

Best regards,
Yuto Sakai