B.
For every instance where the term "eight-inch diameter or smaller public sewer" is used in § 300-58, "twelve-inch diameter or smaller public drain" will be substituted. Also, for every instance where the term "eight-inch diameter" is used in § 300-58, "twelve-inch diameter" will be substituted. The cost of twelve-inch drains will be used as the proportionate share of the costs of public drains.