Rank Restrictions
Genin - D rank Techniques
Chuunin - C rank Techniques
Special Jounin - B rank Techniques
Jounin - A rank Techniques, Can Make a Special Biography
S- Class - S rank Techniques, Can Apply For Sensei Position
Sannin - Forbidden Rank Techniques, Can Create Custom Techniques
Kage - Forbidden Rank Techniques, Can Create Custom Race or Ability
Legendary Sannin - All of the Above
Genin - D rank Techniques
Chuunin - C rank Techniques
Special Jounin - B rank Techniques
Jounin - A rank Techniques, Can Make a Special Biography
S- Class - S rank Techniques, Can Apply For Sensei Position
Sannin - Forbidden Rank Techniques, Can Create Custom Techniques
Kage - Forbidden Rank Techniques, Can Create Custom Race or Ability
Legendary Sannin - All of the Above