The Survey Block - how many votes is a logged-in user allowed per survey?

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So I have set up a survey with the 'Registration is required to answer' option chosen. Then I voted in the survey and I get the message 'You have already voted in this survey.' All good.

All I want to know is: will this survey ever let me vote again? And if so, after what period? And (finally) where can this period be changed?

Thanks so much guys. Had a real good google around this and can't find an answer.

Kind regards

Dan Fyles