Kao i line ministries... Ovo je sa site-a UN! valjda ce pomoci da shtvatite znacenje:-)

Differences in hierarchical structure existed between the Offices of the
President and Prime Ministers and the rest of the line Ministries. Similarly,
there were differences in hierarchical structure among the line Ministries,
with Defense, Interior, Foreign Affairs and Finance usually have variations
from the norm within a given country.