Re: UFP & Cloaking devices (post-singular destiny with spoilers)
^It seems that they already have. As I stated earlier, in Resistance we find out that Starfleet has schematics for cloaking devices implanted in each ships computer core, and is available with an Admiral's say-so...
But until now, if an Admiral did authorize it, they'd be court-martialed for provoking conflict with the RSE by violating treaty...
We are all the sum of our tears. Too little and the ground is not fertile, and nothing can grow there. Too much, and the best of us is washed away.