Section 8-20-233 - Declaration on invoice(1) The sale of petroleum products shall include on the sales statement a definite, plain, and conspicuous declaration of:(a) The quantity of goods sold;(b) The weight or basis for measurement of either gross volume or volume adjusted to standard temperature of sixty degrees Fahrenheit.L. 73: p. 1068, § 6. C.R.S. 1963: § 100-2-33.