Your group is required to have a publicly viewable constitution which must clearly state:

• The purpose of your organization
• A definition of membership in the organization, including:
  • Any member of the MIT student community must be eligible for membership
  • The organization's membership will at all times consist of at least 5 MIT students and be more than half MIT students.
  • The organization shall not discriminate based on any characteristic listed in the MIT Nondiscrimination Policy for membership, officer position, or in any other aspect
  • A clause for membership removal (new requirement)
• About the Officers:
  • Officer election procedure and dates (including what makes a quorum)
  • Explicit terms of office of your group's officers that encompass every day of the year
  • Duties of your group's officers
  • Removal process for officers
  • Must include at least president and treasurer (or corresponding positions) and those two positions must be required to be distinct current MIT students
  • The executive board must be comprised of at least half current MIT students
• About Meetings:
  • The frequency of meetings
  • Who runs the meetings
  • How decisions are made during a meeting (including what makes a quorum)
• Amendment Procedures
  • How the amendment is presented
  • How the amendment is passed
  • The quorum necessary for an amendment to be passed
• The ASA Governance Clause, which states:

The [your group name] agrees to abide by the rules and regulations of the Association of Student Activities, and its executive board. This constitution, amendments to it, and the by-laws of this organization shall be subject to review by the ASA Executive Board to ensure that they are in accordance with the aforementioned rules and regulations.

There is also a sample constitution available.