Local Authority Areas are designated as constituencies, and are allocated a number of MYPs dependent on the size of the youth population in the LAA.
Some areas may also choose to elect one or more informal Deputy Members of Youth Parliament (DMYPs), who deputise for their MYPs according to diary restrictions.
Though only a smaller number existed at first, this has now expanded beyond 350 members, with over 12,000 young people standing for the position in their local areas during the 2008 annual elections.
When a Member of Youth Parliament turns 19, they cease to represent their constituency and trigger a by-election, which is to be arranged by the LAA.
Deputy Members of Youth Parliament have no formal post-nominal initials however some use DMYP to show their role.
Both of these instances are historic in their overturning of ancient protocol, requiring that only members of the respective houses be allowed to sit within them.