Before taking their seats, Members of Parliament must legally swear an oath or make an affirmation of allegiance to the Crown. For some MPs this can be uncomfortable, creating a conflict between personal beliefs and legal obligations. Some MPs find themselves compelled to express sentiments they do not genuinely hold, or risk their constituents being deprived of representation. Unlike oaths taken by other office holders, the parliamentary oath does not address public expectations of MPs, nor does it guide MPs in understanding their duties. It has become a symbolic formality, a shibboleth, that could be usefully reformed.