By decree of the All-Powerful Overlord, Emperor of the Realm, Defender of the Faith, and Supreme Ruler of the Internet:
Section 1: Thou shalt not use Comic Sans in any official document, lest thou be cast into the outer darkness.
Article 1: All employees of the Empire shall use Arial font in all official communications, lest they face the full wrath of the Emperor.
See Mandate 9: The Unyielding (Part 2) for further clarification on the use of Arial font.