(40)satisfy himself, at least once a month, that the credit allowed to purchasers of articles from prison industries, garden, or dairy does not exceed the limits fixed and also see that at the time of purchase of such articles, full name, rank and residence of purchaser is entered in the books. Credit may be allowed to well known persons for a period not exceeding three months;Explanation. - Generally no credit sale is allowed. However, credit may be allowed subject to prior approval of the Superintendent.
