The rule regarding academic money is spelled out in the D1 manual under "Financial Aid".
Specifically, go to section 15.5.3.2.1
http://ncaa.org/library/membership/division_i_manual/2003-04/2003-04_d1_manual.pdf
I've posted this before so do a search if needed.
The D2 info is found in the D2 manual at the same location.