The normal extra fatigue points limit is no more than 30% of your primary attribute, with a perk that allows purchase of up to 50% more (Special Exercises). This has been changed.
Characters can purchase 100% more than the primary attribute and the Special Excercises perk allows up to 150% more. So, if you had 12 HT you would be able to buy 12 more fatigue points for a total of 24. With Training you would be able to buy up to 18 more, for 30 total.
When you purchase Unusual Background (Mana Vessel) 10 pts., you will be able to buy a separate fatigue pool of up to 30 pts. This pool can only be used for powering mana tech, spells or mana-based powers such as imbuements. It can be used in conjunction with the normal fatigue point total if you desire. After character creation this pool can be increased as points become available and the pool’s limit is only as far as the player wishes to spend points for it.