Travel and meals (section 3) applies only to project staff? And in which section should I put travel and meals for conference participants?

Section 3 “Travel and accommodation” is planned for financing expenditure on travel and accommodation costs for missions necessary for the project implementation (e.g. participation in project meetings, project site visits, meetings with the Programme bodies, seminars, conferences, etc.) of the internal staff. Expenditures needed for the external conference participants should be assigned to the budget section 4 “External expertise and services costs”.