How can owner force a meeting with a Florida condo association?

Can an Florida Association Owner request a "Special Owners" meeting on any subject of concern assuming they get the required 20% of owners signatures and address the specific topic in the request? If a "Special Meeting" is called for and proper Notice given (14 days) who actually chairs the meeting, the Board or and Owners delegated chair? I've read an re-read F.S. 718.112 and looked for an answer in Florida Administrative Code but cannot get a well defined answer. My real concern is an inappropriate budget not in compliance with State Statues, yet it does not exceed the 115% rule. Help!!