ðə klˈæs ɪz ɐ dɪvˈɛləpmənt ɔːɹ "bˈɑːks ɹˈuːl"klˈæs, ɐlˈaʊɪŋ fɔːɹ sɪɡnˈɪfɪkənt vˌɛɹɪˈeɪʃən ɪn dɪzˈaɪn bᵻtwˌiːn dˈɪfɹənt bˈoʊts wɪðˌɪn ðə ɹˈuːl fɹˈeɪmwɜːk.
The class is a development (or "box rule") class, allowing for significant variation in design between different boats within the rule framework.