Keel rocker aft for LDL powerboat

I don't know if any definitive rules apply, if the buttocks right aft are level with the water or near enough, ( zero angle of attack) at the cruising trim angle, and one must expect a semi-displacement to squat a little, that should be all good. It is important that the centre of buoyancy is well aft, and the maximum waterline beam also well aft. If you look at this Atkins seabright skiff Everhope, you get the picture with regard to the waterline beam maximum, only being reached well aft.

 

I see there is the Bolger "Sneakeasy", which is supposed to be outboard, with a box keel