AIRBUS task sharing - Paper checklists

[SumFingWong]

Can anyone please clear up a grey area of Airbus operational philosophy for me please ?

When conducting a paper 'checklist', for example the MANUAL ENGINE START procedure from FCOM SUPPLEMENTARY PROCEDURES, who does and says what ?

My guess is that the PNF reads the C/L, and the PF actions each item but I cant find specific reference to it, and it seems to contradict the task sharing during ECAM.

I have also seen wild variations on how Captains run paper checklists out on line.

Is there a standard way ? Is there a reference to back it up ?

Thanks !