There is no real general journalism accreditation in Trinidad. It depends on what you want the press officer to do.
Media Accreditation to matches are done through applications to the TTFF or FIFA (TTFF first, but you can also go directly to FIFA). This is done on an match by match basis, gives the organisation a press pass for the match and usually access to the post game press conferences.
If you're talking about being able to attend JW press conferences, it's about getting invited and knowing where to go. I do believe the Warrior Nation is established enough to gain official accreditation to matches, applications would need to be formal from the WN. This seems the most logical thing, it should allow someone to be there at the post-game press conferences and be able to ask questions directly. If the TTFF denies accreditation, the WN can go like Lasana and go directly to FIFA to push the case for it.