GAs are the only one's who are allowed to do on field coaching and drill work. All the other QCs/Analysts are not supposed to do on field coaching.
There is no limit on "Non-Coaching Sport Specific" staff, this includes QC/Analysts, Recruiting or Player Personnel staff, Operations staff.
http://www.ncaapublications.com/productdownloads/D116JAN.pdf The most updated NCAA D-1 Rule Book.
11.7.4 Bowl Subdivision Football. [FBS] There shall be a limit of one head coach, nine assistant coaches and four graduate assistant coaches who may be employed by an institution in bowl subdivision football. (Revised: 4/28/11 effective 8/1/12)
Edit: 7 Year rule: 11.01.3 Coach, Graduate Assistant—Bowl Subdivision Football. [FBS] In bowl subdivision football, a graduate assistant coach is any coach who has received a baccalaureate degree and has either received his or her first baccalaureate degree or has exhausted athletics eligibility (whichever occurs later) within the previous seven years and qualifies for appointment as a graduate assistant under the policies of the institution. The individual is not required to be enrolled in a specific graduate degree program unless required by institutional policy. The following provisions shall apply: (Adopted: 1/11/89, Revised: 1/10/91, 11/1/01 effective 8/1/02, 1/10/92, 1/16/93, 1/9/96 effective 8/1/96, 5/25/06, 12/15/06, 1/8/07 effective 8/1/07, 11/1/07 effective 8/1/08, 1/16/10 effective 8/1/10, 4/29/10 for new appointments, 1/15/11 effective 8/1/11, 4/26/12, 8/21/12, 1/19/13 effective 8/1/13, 10/21/13)
