Mich. Comp. Laws § 287.553

Sec. 3. No slaughterer, packer or stockyard operator shall bleed or slaughter any livestock except by a humane method. The director, by administrative order, may exempt from compliance with this act, for a period not to exceed 1 year after the effective date of this act, any slaughterer, packer or stockyard operator if he finds that an earlier compliance would cause such person an undue hardship.