Sec. 4. All orders, certificates, and subpoenas made or issued by the state tax department shall be signed by the chairman and the seal of the department shall be affixed.
Mich. Comp. Laws § 209.154
Signature and seal on papers
1925, Act 155, Imd
Official source: Michigan Legislature. Reproduced from public-domain Michigan statutes; confirm against the official source for the current text. Not legal advice.