Lettered Sub-Clause

In Model UN drafting, a lettered sub-clause is one of the indented items — labeled (a), (b), (c), and so on — nested beneath a numbered operative clause in a draft resolution. It allows delegates to enumerate the specific elements, conditions, or sub-actions that flow from a broader operative directive without cluttering the parent clause with a long run-on sentence.

Structurally, sub-clauses sit one indentation level beneath their parent operative paragraph, are typically introduced by a colon at the end of that parent clause, and end with a semicolon (with the final sub-clause closing the parent's punctuation pattern). For example, an operative paragraph reading "Calls upon Member States to:" might be followed by sub-clauses (a) through (d), each beginning with a gerund or noun phrase such as "(a) Strengthening border cooperation;" and "(b) Sharing intelligence on trafficking networks;".

If a sub-clause itself requires further breakdown, drafters generally move to a third tier using lowercase Roman numerals — (i), (ii), (iii) — though many conferences discourage going beyond two levels of nesting for readability. The convention mirrors UN drafting practice visible in General Assembly and Security Council resolutions, where lettered sub-paragraphs appear regularly in operative sections that list obligations or recommendations addressed to multiple actors.

For procedural purposes, lettered sub-clauses are usually amendable independently: a delegate may submit an amendment to strike, add, or modify a single sub-clause (e.g., "Strike operative clause 4(b)") without touching the rest of the operative paragraph. This granularity is one of the main reasons drafters favor sub-clauses — it makes the text easier to negotiate line by line in unmoderated caucus and lets sponsors accept friendly amendments to narrow portions of a clause.

Common drafting pitfalls include mixing parallel structure across sub-clauses (some starting with verbs, others with nouns), and overloading a single parent clause with too many disparate sub-items that should arguably stand as separate operative paragraphs.