Such analytical accounts shall at least separate the costs and revenues associated with each of its core services from those associated with ancillary services.
Le cuntais anailíse den chineál sin, déanfar na costais agus na hioncaim a bhaineann le gach ceann dá seirbhísí lárnacha a dheighilt ó na costais agus na hioncaim a bhaineann le seirbhísí coimhdeacha.