But the husband of a British Queen who occupies the throne has absolutely no formal role.
Many European countries accord unions a prominent, formal role in the regulation of working life.
They also called for pharmacists to be given a more formal role in monitoring the drugs prescribed to patients.
Ofsted was hearing from Sir Michael as part of its formal role in the appointment process for the post.
However the debate - used by unions and local parties to make a point - has no formal role in party policy.
Ms Grybauskaite's main formal role as president lies in foreign policy.
At present, select committees have no formal role in the legislative process, although they are sometimes invited to scrutinise draft bills - and their verdicts carry clout.
BBC: Commons Speaker calls for sweeping new committee powers
Parts of Afghanistan's 1963 constitution, which was in place during the monarchy, were used to create the draft proposal, a source said, though no formal role for the king is envisioned in a new government.
It gave the EU a formal solidarity role - meaning an EU state under attack would be guaranteed assistance by other member states.
She was at ease among popes, presidents and kings and, though she lacked any formal legal or constitutional role, she had the ear of a succession of New Zealand's prime ministers.
Dance also plays a central role in formal ceremonies such as "Iyomante, " in which participants send the deity embodied in a bear they have eaten back to heaven by mimicking the movements of a living bear.
No formal announcement on Britain's role is expected until next week, timed to coincide with a UN Security Council resolution giving the security force a mandate.
R.1: Traditional craftsmanship for violin-making has been transmitted from generation to generation, both through apprenticeship and through formal education, playing an important role in the everyday life of people in Cremona and giving them a sense of identity.
Qaddafi currently holds no formal government post, but he has been playing a critical role in laying new, profoundly positive foundations for Libya's future.
The aim of the European Youth Forum during this week is to stress the wide potential and the pivotal role played by youth organizations in delivering non-formal education.
Mitchell's role as head of the settlement talks was played without formal authority, only the respect he earned from all the parties.
Formal training has not gone away, and it still plays a huge role in career development and professional networking.
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