Quick search by citation:

10 U.S. Code § 2156 - Joint Forces Staff College: duration of principal course of instruction

(a) Duration.—
The duration of the principal course of instruction offered at the Joint Forces Staff College may not be less than 10 weeks of resident instruction.
(b) Definition.—
In this section, the term “principal course of instruction” means any course of instruction offered at the Joint Forces Staff College as Phase II joint professional military education.