The political head of some 15 government ministries – such as the Ministry of Education and Culture or the Ministry of Finance – is a minister. Ministers are appointed by the governor-general, on the advice of the prime minister, from among the senators and members of the House of Assembly. The administrative head of each ministry is a public officer or civil servant appointed by the governor-general, and holds the title of permanent secretary. The constitution of St Lucia states that there must be a permanent secretary supervising every government department, although the same permanent secretary is permitted to supervise two or more departments. Permanent secretaries are supported by deputy permanent secretaries.