This chapter addresses the long-standing problem of morphologically conditioned exceptions in accent assignment. Vaxman introduces a new approach, called the Scales-and-Parameters theory, a new parametric, non-metrical theory of word accent, which takes as a point of departure the Primary Accent First theory of van der Hulst. As the author claims, the proposed grammar accurately derives accent location in lexical accent systems with dominant suffixes and in phonological weight-sensitive systems in which certain morphemes violate the accent rule. A core proposal of the theory is to extend the notion “weight” to morphemes by treating their accent-attracting ability as “diacritic weight” (rather than lexical accent). Vaxman shows that since weight is a scalar variable, it allows for novel types of weight scales, that is, those containing diacritic and/or phonological weight. Reference to such scales allows the S&P parameter system to correctly assign word accent and to account for morpheme-specific exceptions, as illustrated here with detailed case studies of Central Selkup and Eastern Literary Mari.