Hi Isabella,
With the EFM Program it depends on which branch (some branches do not have categories). We are Navy which has 6 categories and my daughter is in Cat 5 meaning my husband is allowed to perform sea and shore duty here (homesteading), some CFers have Cat 4 meaning that they should live near a major medical facility. We live in San Diego and are lucky to have 2 clinics here (1 military and the other civilian). We have thought of going overseas, but I am reluctant to do so because I feel the US has the best CF care out there, along with the UK and Australia. We can stay here in SD or be stationed basically where we want as long there is a CF clinic. Look at this link below (I know it's long!)and it will give you info for all branches, not sure which branch you are.
<a target=_blank class=ftalternatingbarlinklarge href="http://www.militaryhomefront.dod.mil/portal/page/mhf/MHF/MHF_DETAIL_1?section_id=20.40.500.570.0.0.0.0.0¤t_id=20.40.500.570.500.20.0.0.0
">http://www.militaryhomefront.d....500.570.500.20.0.0.0
</a>
Hope this helps, take care,
Gina