According to Hale (2008), its elements are "compulsory and are designed according to national, state, [or] district... standard[s]" (p. 146).
ɐkˈoːɹdɪŋ tə hˈeɪl tˈuː θˈaʊzənd ˈeɪt, ɪts ˈɛlɪmənts ɑːɹ "kəmpˈʌlsɚɹi ænd ɑːɹ dɪzˈaɪnd ɐkˈoːɹdɪŋ tə nˈæʃənəl, stˈeɪt, ɔːɹ dˈɪstɹɪkt... stˈændɚd ˈɛs" pˈiː. wˈʌnhˈʌndɹɪd fˈoːɹɾi sˈɪks.