The game doesn't really feel like it is built to have the players have to train to get new Talents or Powers as the XP award mechanic and the "buildy" nature of the game suggests that the players will get XP frequently and should be spending it to improve.
In some systems I have played with over the years there is a training requirement for advancement or acquisition of abilities that helps to explain the character's ability to use new capabilities. I have heard it suggested that Force Powers are metered in this way as it is suggested that a Mentor, Holocron, or some other source of training be available to the character to explain their ability to progress in Force Powers.
It seems to me that new Talents and especially new Specializations might need some narrative explanation as to how the character was able to manifest the new expertise, and that this would be something on which the player and GM could collaborate.
How do you handle Training Requirements, if any, in your game? How does that play out, and have you ever had any friction over asking for explanations or making characters seek out Training/Advancement. Thanks for any anecdotes