US lawMaineConstitutionArticle IX7Me. Const. art. IX, § 7ME Const., Article IX, Section 7Length: 22 wordsOfficial source Valuation. While the public expenses shall be assessed on estates, a general valuation shall be taken at least once in 10 years.PreviousMe. Const. art. IX, § 6NextMe. Const. art. IX, § 8