According to the Note section of the module:
"This module can be used by all branches of service in the ComStar or Word of Blake affiliations. However, ComStar or Word of Blake members trained in intelligence, police or military Skill Fields can choose Covert Operations, To Serve and Protect, and Tour of Duty modules (respectively) instead."
Does this mean that if you selected ComStar/Word of Blake in your Stage 0: Affiliations when going through the Lifepath method, you MUST take ComStar/Word of Blake Service in the Stage 4: Real Life section? There is nothing listed in the Affiliations section or in the description of the module or Prerequisites of the module to indicate this. However, since Covert Operations, To Serve and Protect and Tour of Duty modules do not hinder a ComStar/Word of Blake Affiliation from joining normally, it leads to this question.