In order to be eligible to cohabit in surplus Service Family Accommodation (SFA), you must be in a long term relationship (LTR(E)) that is recognised by Defence and recorded as such on JPA.
To do this you need to record your relationship on JPA (via add a contact). You then need to collect and retain details of events and documents over the following 365 days which can be used in the future to evidence the relationship.
After 365 days, you can take this evidence to your Unit HR Admin and request that your relationship is converted to LTR(R).
If you are already in a long term relationship for longer than 365 days you can achieve LTR(E) status without a JPA self-service recorded period if you can demonstrate your relationship has lasted at least 365 days.
Please refer to JSP 464 (volume 1, part 1) Annex A and B.