No, I don't believe there are any such requirements. What you have to do is start a new thread with a general statement about the poll/question, scroll down to "Additional Options" , and check "Yes, post a poll with this thread", and choose the number of options. After you submit the thread, you'll be asked to submit the options for the poll. You can choose between a "public" and "private" poll. The private polls, where people can't see who voted how, seem to attract more respondents.
If you run into trouble, contact a moderator, as any of us can edit a poll.