Yes. Futsal is a different version of indoor soccer. The rules are very different from outdoor soccer and USSF requires a different certification.
Most of the courses occur late October early November. Occasionally, a clinic may be offered at different time but most futsal leagues occur during the winter. A link to the current list of available clinics can be found on the Futsal Courses page. Keep in mind that the list is being updated constantly, so keep
The Futsal Laws of the Game are authorized by the International Football Association Board (IFAB) and provided by the FIFA. You can find those Laws here