Michigan Compiled Laws, Chapter 26. Supreme Court Reports § 26.13

Sec. 13. Said contractor shall, within the same time, place the same on sale in the city of Detroit and city of Lansing, and such other places in Michigan as may be directed by said justices in writing, in quantities sufficient to meet all demands, and shall thereafter at all times keep the same on sale to citizens of this state, at the places aforesaid, in sufficient quantities, at a price not exceeding the price named in the contract.