According to the NCAA Rule Book, Drop Kicks are fully legal for both FG’s and Extra Points.
SECTION 16. KICKS; KICKING THE BALL
Kicking the Ball; Legal and Illegal Kicks
ARTICLE 1.
Kicking the ball is intentionally striking the ball with the knee, lower leg or foot.
A legal kick is a punt, drop kick or place kick made according to the rules by a player of Team A before a change of team possession. Kicking the ball in any other manner is illegal (A.R. 6-1-2-I).
SECTION 16. KICKS; KICKING THE BALL
Kicking the Ball; Legal and Illegal Kicks
ARTICLE 1.
Kicking the ball is intentionally striking the ball with the knee, lower leg or foot.
A legal kick is a punt, drop kick or place kick made according to the rules by a player of Team A before a change of team possession. Kicking the ball in any other manner is illegal (A.R. 6-1-2-I).