Anyone wishing to join the Corps 3 (Volunteer) MI Bn or 5 (Volunteer) MI Bn can find details on links from the main Corps site). In outline the process is: The interested party contacts local Coy or HQ 3 (V) MI / HQ 5 (V) MI. Invited for interview with Permanent Staff Administration Officer (PSAO). Basic background checks on education and nationality. Recommended for assessment by the PSAO. Basic medical. Battalion selection weekend - mental and physical assessment. Offer of a place if found suitable. TA Common Military syllabus (CMS) training following initial training at TA Centre. Follow-on CMS training at the TA Centre. Trade Training. The time taken to complete the process varies depending on the time the individual is able to commit to the TA.