 However , Thio Li @-@ ann believes that it is undesirable that the law does not impose a timeframe for the calling of by @-@ elections . If a by @-@ election is not called promptly upon a parliamentary seat falling vacant , the electors in the GRC in question will be represented to a lesser extent . This is particularly pertinent where more than one MP vacates his or her seat or when the seat vacated is that of a minority candidate . Should the latter situation arise , the rationale behind the GRC scheme – to guarantee minority representation in Parliament – would be defeated . 
