Cite the letters patent consistently with the rule for citing modern statutes (rule 4.1.4). Letters patent are divided into clauses which take the abbreviation “cl or “cls” in the plural.
Eg Letters Patent Constituting the Office of the Governor-General of New Zealand 1983, cl 12.
Eg Letters Patent Constituting the Office of Governor-General and Commander-in-Chief of the Dominion of New Zealand 1917, cl 2.