(a) The standard for weight is the standard of avoirdupois and troy weights. Other weights shall be derived and ascertained from that standard.
(b) The avoirdupois pound bears to the troy pound the ratio of 7,000 grains to 5,760 grains. The avoirdupois pound is divided into 16 equal parts called ounces.

(c) The hundredweight consists of 100 avoirdupois pounds. The ton consists of 2,000 avoirdupois pounds.
(d) The troy ounce is equal to one-twelfth of a troy pound.