This skill is listed as a 'short movement skill'. In particular, this seems to interact oddly with fireteams where all members of the fireteam can perform short movement skills. Should it just be a 'short skill' like casevac, and thus be a support skill for fireteams?
The Fireteam Rules Annex suggests that although Discover is a technically a short movement skill, it is treated as a Support Skill for the sake of Fireteam Activation. It also makes an exception for the vaguely defined 'scenario short skills' Here's a relevant passage (p6): SUPPORT SKILLS This classification includes the Skills not specified in the previous classifications. Basically, this includes the Short Movement Skill Discover, all Short Skills except those stated in the Evasion classification, and all Entire Order Skills that do not have the Movement Label. This category also includes scenario Short Skills, such as “Activate Console” or “Deploy and Activate Beacon”. I would assume that an argument could be made that Civevac is a 'scenario short skill' and/or that it is, like Discover, an exception to the normal Short Movement Skills category.