To become a member of IAABO Board 173, new members must complete the following five steps:

1. Obtain a MSHSAA number
   All officials must register with the The Missouri State High School Athletic Association (MSHSAA). To get started with your MSHSAA registration, visit the MSHSAA Officials page.
   
   
2. Contact IAABO 173
   After you receive your MSHSAA number, contact IAABO 173 with the following information to register with IAABO 173 with this Membership Application.
   
   
3. Attend the IAABO 173 Jamboree
   
   
4. Official Development Program (ODP): Members with less than a year's experience in officiating must participate in the IAABO 173 Official Development Program (ODP). This program matches new officials with a mentor to improve their skills and help them achieve their officiating goals.
   Note: Members with 1-3 years of officiating experience are also encouraged to participate in the ODP Program, but it is not required.
   
   
5. Attend IAABO 173 Meetings: (hyperlink to Meetings page). There are two IAABO 173 meetings in the fall (rules calibration) and one meeting in the spring (administrative and social).