A Chapter shall be a technical subunit of a Region, one or more Sections or a Geographic Council. There may be single Society Chapters, joint Society Chapters, and Technical Council Chapters. A Chapter shall comprise a minimum of twelve (12) IEEE voting members of a Society, or group of Societies in the case of a joint chapter, and shall be established by petition to the parent geographical and technical organizational units concerned to fulfill the mission of IEEE. In the case of a Technical Council Chapter, a minimum of any twelve (12) IEEE voting members of Council Member Societies in the parent geographical unit shall be required to petition to the geographic unit and to the Technical Council.
The most important document you will need to complete is the Petition for the Establishment of an IEEE Society Chapter