Rapid Preparation Clarification

[LordHelmet]

Can someone please clarify the actual mechanics of how Mythic Ability Rapid Preparation works? From the description it says I can literally rememorize all my spells in 15 minutes. Does that require rest? Before? After? How much? How long. We are in the middle of storming a keep currently and I expended a good deal of spells wiping out the initial defenses. Is it possible to duck into a secure room and get my entire spell complement back in 15 mins? If so that would be awesome.
I know I won't get my mythic points back because you need a full rest for that but the spells it really doesn't clarify. Anyone know the actual rules on this?

[dragonhunterq]

It doesn't change any of the other requirements for memorising spells other than the time required.

A rule only changes what it tells you it changes, if it doesn't mention some aspect you revert to the original rule for how the unmentioned aspect works.

So, in this instance you still need rest.

[PokeyCA]

If you are at least 3rd mythic tier, you could spend 1 mythic point, rest 1 hour, and regain all of your spells and daily abilities (see Recuperation). This won't apply to your mythic points or mythic abilities.