§ 221. Company stores. No person engaged in construction of public
work under contract with the state or with any municipal corporation
either as a contractor or subcontractor shall, directly or indirectly,
conduct what is commonly known as a company store if there is any store
selling supplies within two miles of the place where such contract is
being executed. Charges for groceries, provisions, board, lodging or
clothing shall not be a valid off-set in behalf of the employer against
wages.