The ministry, school, hospital, bank, agency or company that a service person is posted to for the year. The national service term of art, used on every form.
It matters more than any other variable in the service year. The same allowance, the same twelve months and the same certificate produce a year of real work and a reference at one user agency, and a year of sitting in a corridor at another. The Authority assigns you; the agency decides what happens next.
A user agency that wants to keep you can apply to absorb you at the end, which is how a large share of Ghanaian careers actually start.