The text of the Vishtasp Sast is divided into eight chapters, called
fragards. These fragards are used during the
Vishtasp Yasht ceremony as insertions into the text of the
Visperad ceremony. This is similar to the fragards of the
Vendidad, which are likewise inserted into the Visperad ceremony during a performance of a Vendidad ceremony. Since the sections of the Visperad are called
karde, the term fragard has consequently being interpreted as
around a karde. The content of the
Vishtasp Sast is not always clear, due to the deteriorated
Avestan of the text. On the other hand, the
Middle Persian translation of the text, present in the Pahlavi manuscripts, has been considered to be rather faithful. The content of the text mostly consists of
Zarathustra explaining a number of principles of the religion to
Vishtaspa. ==Editions and translations==