Perthshire voters are being given the opportunity to choose a candidate for Westminster for the first time.
The Scottish Conservatives are holding an open primary, a method used commonly for choosing US presidential candidates, to select who stands for the party locally in the 2015 election.
All those registered to vote in the Perth and North Perthshire constituency can register to take part in the selection process, along with local party members.
Some 72,141 people in the area were eligible to vote in the 2010 election.
Parliamentary candidates are normally chosen by party members living in the constituency but the Tories are opening up the process to the public.
Those attending the primary will be given a vote at the end of the event once the various applicants are quizzed on their suitability for selection as a candidate.
Each applicant will be interviewed by an independent moderator for up to 10 minutes before later taking part in a Q&A session with the audience for up to 20 minutes.
Attendees at the hustings will then be given a slip for the secret ballot and the successful applicant must receive more than 50% of the votes cast.
The system will also be used in West Aberdeenshire and Kincardine and a number of English seats.