. . . . . . . . . . . "Statutory instrument papers are given a number in the SI series which runs from number 1 each calendar year. SIs may be cited using prefix number and year e.g. SI 1986/935" . "statutory instrument number" . "statutory instrument number" . "Statutory instrument papers are given a number in the SI series which runs from number 1 each calendar year. SIs may be cited using prefix number and year e.g. SI 1986/935" .